List of Major League Baseball annual ERA leaders

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Ed Walsh's career earned run average (ERA) of 1.82 is the lowest in the history of Major League Baseball.[1]

In baseball, earned run average (ERA) is a statistic used to evaluate pitchers, calculated as the mean of earned runs given up by a pitcher per nine innings pitched.[a] A pitcher is assessed an earned run for each run scored by a baserunner who reached base while batting against that pitcher, whether by hit, base on balls or "walk", or being hit by a pitched ball;[2] an earned run can be charged after the pitcher is relieved if he allows the runner before leaving the game.[3] Runs scored by players who reach base on errors, passed balls, or catcher interference under special circumstances are treated as unearned runs, and do not count towards the pitcher's ERA.[3]

Major League Baseball recognizes the player in each league[b] with the lowest earned run average each season.[c] The first ERA champion in the National League was George Bradley; in the National League's inaugural 1876 season, Bradley posted a 1.23 ERA for the St. Louis Brown Stockings, allowing 78 earned runs in 573 innings pitched.[4] The American League was established in 1901, and Hall of Fame pitcher Cy Young led that league with a 1.62 ERA for the Boston Americans during the 1901 season.[5]

Over the course of his 17-year major league career, Lefty Grove led the American League in ERA nine times, with a career single-season low of 2.06 for the 1931 Philadelphia Athletics.[6] Roger Clemens has won the second-most ERA titles, capturing six in the American League and one in the National League.[7] Sandy Koufax led the National League in ERA for five consecutive seasons (1962–1966); Koufax' five awards are the most won consecutively by any player and are tied for the most awards in by a player in the National League with Christy Mathewson.[8][9] In the American League, Walter Johnson also won five ERA titles,[10] and Pedro Martínez has won a total of five (four American League and one National League) with two different teams.[11]

The most recent ERA champions are Aaron Sanchez in the American League and Kyle Hendricks in the National League.

The lowest single-season ERA in league history was posted by Tim Keefe, whose 0.86 ERA in 105 innings pitched for the National League's Troy Trojans in 1880 led his closest competitor by .52 runs.[12] In the American League, Dutch Leonard's 0.96 ERA is a single-season record.[13] Keefe and Leonard are the only two pitchers ever to allow less than one run per nine innings pitched in a single season. The widest margin of victory for an ERA champion is 1.96 runs, achieved when Martínez' 1.74 ERA led Clemens' 3.70 in the American League during the 2000 season. The largest margin of victory in the National League is 1.26 runs—Dazzy Vance's 2.61 ERA over Carl Hubbell's 3.87 in 1930. The smallest margin of victory for an ERA champion is .009 runs. Although the statistic is traditionally recorded to two decimal places by most sources,[14][15][16] the 1988 American League title was decided by a margin of less than one hundredth of a run when Allan Anderson's ERA of 2.446 (55 earned runs in  202 1⁄3 innings)[17] bested Teddy Higuera's 2.455 mark (62 earned runs in  227 1⁄3 innings).[18] Other contests decided by one hundredth or less include Luis Tiant's 1.91 ERA ahead of Gaylord Perry's 1.92 in 1972[19][20] and Mark Fidrych (2.34) over Vida Blue (2.35) in 1976.[21][22]

Key

Year Links to the corresponding "year in baseball" or "Major League Baseball season" article
Leader Player with the lowest earned run average (ERA) in the league
Runner-up Player with the second-best ERA in the league
League Denoted only for players outside of the modern major leagues
† Member of the National Baseball Hall of Fame and Museum

National League

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Tommy Bond won the triple crown in 1877, leading the National League in wins, strikeouts, and ERA.[23]
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Christy Mathewson's career ERA of 2.13 is eighth on the all-time list; he led the National League in ERA five times during his career.
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Grover Cleveland Alexander won the National League ERA title four times with two different teams (the Philadelphia Phillies and the Chicago Cubs).
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Mordecai "Three-Finger" Brown led the league in ERA in 1906 and finished second three times.
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Amos Rusie led the National League in ERA in 1894 and 1897, and finished second to Ted Breitenstein in 1893.
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Sandy Koufax' five consecutive seasons leading the National League in ERA is a Major League Baseball record.
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Jake Peavy's 2007 ERA of 2.54 led all National League pitchers.[24]
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Johan Santana won the ERA title in his first National League season after eight years with the Minnesota Twins.
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Chris Carpenter had the lowest ERA in the National League in 2009.
Clayton Kershaw is the first pitcher in history to lead MLB in ERA for 4 consecutive years (2011–2014).
Year Leader ERA Team Runner-up ERA Ref
1876 Bradley, GeorgeGeorge Bradley 1.23 St. Louis Brown Stockings Devlin, JimJim Devlin 1.56 [25]
1877 Bond, TommyTommy Bond 2.11 Boston Red Caps Larkin, TerryTerry Larkin 2.14 [26]
1878 Ward, John MontgomeryJohn Montgomery Ward† 1.51 Providence Grays McCormick, JimJim McCormick 1.69 [27]
1879 Bond, TommyTommy Bond 1.96 Boston Red Caps White, WillWill White 1.99 [28]
1880 Keefe, TimTim Keefe† 0.86 Troy Trojans Bradley, GeorgeGeorge Bradley 1.38 [29]
1881 Wiedman, StumpStump Wiedman 1.80 Detroit Wolverines Ward, John MontgomeryJohn Montgomery Ward† 2.13 [30]
1882 Corcoran, LarryLarry Corcoran 1.95 Chicago White Stockings Radbourn, CharlesCharles Radbourn† 2.09 [31]
1883 McCormick, JimJim McCormick 1.84 Cleveland Blues Radbourn, CharlesCharles Radbourn† 2.05 [32]
1884 Radbourn, CharlesCharles Radbourn† 1.38 Providence Grays Sweeney, CharlieCharlie Sweeney 1.55 [33]
1885 Keefe, TimTim Keefe† 1.58 New York Giants Welch, MickeyMickey Welch† 1.66 [34]
1886 Boyle, HenryHenry Boyle 1.76 St. Louis Maroons Ferguson, CharlieCharlie Ferguson 1.96 [35]
1887 Casey, DanDan Casey 2.86 Philadelphia Phillies Conway, PetePete Conway 2.90 [36]
1888 Keefe, TimTim Keefe† 1.74 New York Giants Sanders, BenBen Sanders 1.90 [37]
1889 Clarkson, JohnJohn Clarkson† 2.73 Boston Beaneaters Bakley, JerseyJersey Bakley 2.96 [38]
1890 Rhines, BillyBilly Rhines 1.95 Cincinnati Reds Nichols, KidKid Nichols† 2.23 [39]
1891 Ewing, JohnJohn Ewing 2.27 New York Giants Nichols, KidKid Nichols† 2.39 [40]
1892 Young, CyCy Young† 1.93 Cleveland Spiders Keefe, TimTim Keefe† 2.36 [41]
1893 Breitenstein, TedTed Breitenstein 3.18 St. Louis Browns Rusie, AmosAmos Rusie† 3.23 [42]
1894 Rusie, AmosAmos Rusie† 2.78 New York Giants Meekin, JouettJouett Meekin 3.70 [43]
1895 Maul, AlAl Maul 2.45 Washington Senators Hawley, PinkPink Hawley 3.18 [44]
1896 Rhines, BillyBilly Rhines 2.45 Cincinnati Reds Nichols, KidKid Nichols† 2.83 [45]
1897 Rusie, AmosAmos Rusie† 2.54 New York Giants Nichols, KidKid Nichols† 2.64 [46]
1898 Griffith, ClarkClark Griffith† 1.88 Chicago Orphans Maul, AlAl Maul 2.10 [47]
1899 Willis, VicVic Willis† 2.50 Boston Beaneaters Young, CyCy Young† 2.58 [48]
1900 Waddell, RubeRube Waddell† 2.37 Pittsburgh Pirates Garvin, NedNed Garvin 2.41 [49]
1901 Tannehill, JesseJesse Tannehill 2.18 Pittsburgh Pirates Phillippe, DeaconDeacon Phillippe 2.22 [50]
1902 Taylor, JackJack Taylor 1.33 Chicago Orphans Hahn, NoodlesNoodles Hahn 1.77 [51]
1903 Leever, SamSam Leever 2.06 Pittsburgh Pirates Mathewson, ChristyChristy Mathewson† 2.26 [52]
1904 McGinnity, JoeJoe McGinnity† 1.61 New York Giants Garvin, NedNed Garvin 1.68 [53]
1905 Mathewson, ChristyChristy Mathewson† 1.28 New York Giants Reulbach, EdEd Reulbach 1.42 [54]
1906 Brown, MordecaiMordecai Brown† 1.04 Chicago Cubs Pfiester, JackJack Pfiester 1.51 [55]
1907 Pfiester, JackJack Pfiester 1.15 Chicago Cubs Lundgren, CarlCarl Lundgren 1.17 [56]
1908 Mathewson, ChristyChristy Mathewson† 1.43 New York Giants Brown, MordecaiMordecai Brown† 1.47 [57]
1909 Mathewson, ChristyChristy Mathewson† 1.14 New York Giants Brown, MordecaiMordecai Brown† 1.31 [58]
1910 Cole, KingKing Cole 1.80 Chicago Cubs Brown, MordecaiMordecai Brown† 1.86 [59]
1911 Mathewson, ChristyChristy Mathewson† 1.99 New York Giants Richie, LewLew Richie 2.31 [60]
1912 Tesreau, JeffJeff Tesreau 1.96 New York Giants Mathewson, ChristyChristy Mathewson† 2.12 [61]
1913 Mathewson, ChristyChristy Mathewson† 2.06 New York Giants Adams, BabeBabe Adams 2.15 [62]
1914 Doak, BillBill Doak 1.72 St. Louis Cardinals James, BillBill James 1.90 [63]
1915 Alexander, Grover ClevelandGrover Cleveland Alexander† 1.22 Philadelphia Phillies Toney, FredFred Toney 1.58 [64]
1916 Alexander, Grover ClevelandGrover Cleveland Alexander† 1.55 Philadelphia Phillies Marquard, RubeRube Marquard† 1.58 [65]
1917 Anderson, FredFred Anderson 1.44 New York Giants Alexander, Grover ClevelandGrover Cleveland Alexander† 1.83 [66]
1918 Vaughn, HippoHippo Vaughn 1.74 Chicago Cubs Tyler, LeftyLefty Tyler 2.00 [67]
1919 Alexander, Grover ClevelandGrover Cleveland Alexander† 1.72 Chicago Cubs Vaughn, HippoHippo Vaughn 1.79 [68]
1920 Alexander, Grover ClevelandGrover Cleveland Alexander† 1.91 Chicago Cubs Adams, BabeBabe Adams 2.16 [69]
1921 Doak, BillBill Doak 2.59 St. Louis Cardinals Adams, BabeBabe Adams 2.64 [70]
1922 Douglas, PhilPhil Douglas 2.63 St. Louis Cardinals Ryan, RosyRosy Ryan 3.01 [71]
1923 Luque, DolfDolf Luque 1.93 Cincinnati Reds Rixey, EppaEppa Rixey† 2.80 [72]
1924 Vance, DazzyDazzy Vance† 2.16 Brooklyn Robins McQuillan, HughHugh McQuillan 2.69 [73]
1925 Luque, DolfDolf Luque 2.63 Cincinnati Reds Rixey, EppaEppa Rixey† 2.88 [74]
1926 Kremer, RayRay Kremer 2.61 Pittsburgh Pirates Root, CharlieCharlie Root 2.82 [75]
1927 Kremer, RayRay Kremer 2.47 Pittsburgh Pirates Alexander, Grover ClevelandGrover Cleveland Alexander† 2.52 [76]
1928 Vance, DazzyDazzy Vance† 2.09 Brooklyn Robins Blake, SheriffSheriff Blake 2.47 [77]
1929 Walker, BillBill Walker 3.09 New York Giants Grimes, BurleighBurleigh Grimes† 3.13 [78]
1930 Vance, DazzyDazzy Vance† 2.61 Brooklyn Robins Hubbell, CarlCarl Hubbell† 3.87 [79]
1931 Walker, BillBill Walker 2.26 New York Giants Hubbell, CarlCarl Hubbell† 2.65 [80]
1932 Warneke, LonLon Warneke 2.37 Chicago Cubs Hubbell, CarlCarl Hubbell† 2.50 [81]
1933 Hubbell, CarlCarl Hubbell† 1.66 New York Giants Warneke, LonLon Warneke 2.00 [82]
1934 Hubbell, CarlCarl Hubbell† 2.30 New York Giants Dean, DizzyDizzy Dean† 2.66 [83]
1935 Blanton, CyCy Blanton 2.58 Pittsburgh Pirates Swift, BillBill Swift 2.70 [84]
1936 Hubbell, CarlCarl Hubbell† 2.31 New York Giants MacFayden, DannyDanny MacFayden 2.87 [85]
1937 Turner, JimJim Turner 2.38 Boston Bees Melton, CliffCliff Melton 2.61 [86]
1938 Lee, BillBill Lee 2.66 Chicago Cubs Root, CharlieCharlie Root 2.86 [87]
1939 Walters, BuckyBucky Walters 2.29 Cincinnati Reds Bowman, BobBob Bowman 2.60 [88]
1940 Walters, BuckyBucky Walters 2.48 Cincinnati Reds Passeau, ClaudeClaude Passeau 2.50 [89]
1941 Riddle, ElmerElmer Riddle 2.24 Cincinnati Reds Wyatt, WhitWhit Wyatt 2.34 [90]
1942 Cooper, MortMort Cooper 1.78 St. Louis Cardinals Beazley, JohnnyJohnny Beazley 2.13 [91]
1943 Lanier, MaxMax Lanier 1.90 St. Louis Cardinals Cooper, MortMort Cooper 2.30 [92]
1944 Heusser, EdEd Heusser 2.38 Cincinnati Reds Walters, BuckyBucky Walters 2.40 [93]
1945 Prim, RayRay Prim 2.40 Chicago Cubs Passeau, ClaudeClaude Passeau 2.46 [94]
1946 Pollet, HowieHowie Pollet 2.10 St. Louis Cardinals Sain, JohnnyJohnny Sain 2.21 [95]
1947 Spahn, WarrenWarren Spahn† 2.33 Boston Braves Blackwell, EwellEwell Blackwell 2.47 [96]
1948 Brecheen, HarryHarry Brecheen 2.24 St. Louis Cardinals Leonard, DutchDutch Leonard 2.51 [97]
1949 Koslo, DaveDave Koslo 2.50 New York Giants Staley, JerryJerry Staley 2.73 [98]
1950 Maglie, SalSal Maglie 2.71 New York Giants Blackwell, EwellEwell Blackwell 2.97 [99]
1951 Nichols, ChetChet Nichols, Jr. 2.88 Boston Braves Maglie, SalSal Maglie 2.93 [100]
1952 Wilhelm, HoytHoyt Wilhelm† 2.43 New York Giants Hacker, WarrenWarren Hacker 2.58 [101]
1953 Spahn, WarrenWarren Spahn† 2.10 Milwaukee Braves Roberts, RobinRobin Roberts† 2.75 [102]
1954 Antonelli, JohnnyJohnny Antonelli 2.30 New York Giants Burdette, LewLew Burdette 2.76 [103]
1955 Friend, BobBob Friend 2.83 Pittsburgh Pirates Newcombe, DonDon Newcombe 3.20 [104]
1956 Burdette, LewLew Burdette 2.70 Milwaukee Braves Spahn, WarrenWarren Spahn† 2.78 [105]
1957 Podres, JohnnyJohnny Podres 2.66 Brooklyn Dodgers Drysdale, DonDon Drysdale† 2.69 [106]
1958 Miller, StuStu Miller 2.47 San Francisco Giants Jones, SamSam Jones 2.88 [107]
1959 Jones, SamSam Jones 2.83 San Francisco Giants Miller, StuStu Miller 2.84 [108]
1960 McCormick, MikeMike McCormick 2.70 San Francisco Giants Broglio, ErnieErnie Broglio 2.74 [109]
1961 Spahn, WarrenWarren Spahn† 3.02 Milwaukee Braves O'Toole, JimJim O'Toole 3.10 [110]
1962 Koufax, SandySandy Koufax† 2.54 Los Angeles Dodgers Shaw, BobBob Shaw 2.80 [111]
1963 Koufax, SandySandy Koufax† 1.88 Los Angeles Dodgers Ellsworth, DickDick Ellsworth 2.11 [112]
1964 Koufax, SandySandy Koufax† 1.74 Los Angeles Dodgers Drysdale, DonDon Drysdale† 2.18 [113]
1965 Koufax, SandySandy Koufax† 2.04 Los Angeles Dodgers Marichal, JuanJuan Marichal† 2.13 [114]
1966 Koufax, SandySandy Koufax† 1.73 Los Angeles Dodgers Cuellar, MikeMike Cuellar 2.22 [115]
1967 Niekro, PhilPhil Niekro† 1.87 Atlanta Braves Bunning, JimJim Bunning† 2.29 [116]
1968 Gibson, BobBob Gibson† 1.12 St. Louis Cardinals Bolin, BobbyBobby Bolin 1.99 [117]
1969 Marichal, JuanJuan Marichal† 2.10 San Francisco Giants Carlton, SteveSteve Carlton† 2.17 [118]
1970 Seaver, TomTom Seaver† 2.82 New York Mets Simpson, WayneWayne Simpson 3.02 [119]
1971 Seaver, TomTom Seaver† 1.76 New York Mets Roberts, DaveDave Roberts 2.10 [120]
1972 Carlton, SteveSteve Carlton† 1.97 Philadelphia Phillies Nolan, GaryGary Nolan 1.99 [121]
1973 Seaver, TomTom Seaver† 2.08 New York Mets Sutton, DonDon Sutton† 2.42 [122]
1974 Capra, BuzzBuzz Capra 2.28 Atlanta Braves Niekro, PhilPhil Niekro† 2.38 [123]
1975 Jones, RandyRandy Jones 2.24 San Diego Padres Messersmith, AndyAndy Messersmith 2.29 [124]
1976 Denny, JohnJohn Denny 2.52 St. Louis Cardinals Rau, DougDoug Rau 2.57 [125]
1977 Candelaria, JohnJohn Candelaria 2.34 Pittsburgh Pirates Seaver, TomTom Seaver† 2.58 [126]
1978 Swan, CraigCraig Swan 2.43 New York Mets Rogers, SteveSteve Rogers 2.47 [127]
1979 Richard, J. R.J. R. Richard 2.71 Houston Astros Hume, TomTom Hume 2.76 [128]
1980 Sutton, DonDon Sutton† 2.20 Los Angeles Dodgers Carlton, SteveSteve Carlton† 2.34 [129]
1981 Ryan, NolanNolan Ryan† 1.69 Houston Astros Knepper, BobBob Knepper 2.18 [130]
1982 Rogers, SteveSteve Rogers 2.40 Montreal Expos Niekro, JoeJoe Niekro 2.47[a] [131]
1983 Hammaker, AtleeAtlee Hammaker 2.25 San Francisco Giants Denny, JohnJohn Denny 2.37 [132]
1984 Pena, AlejandroAlejandro Peña 2.48 Los Angeles Dodgers Gooden, DwightDwight Gooden 2.60 [133]
1985 Gooden, DwightDwight Gooden 1.53 New York Mets Tudor, JohnJohn Tudor 1.93 [134]
1986 Scott, MikeMike Scott 2.22 Houston Astros Ojeda, BobBob Ojeda 2.57 [135]
1987 Ryan, NolanNolan Ryan† 2.76 Houston Astros Dunne, MikeMike Dunne 3.03 [136]
1988 Magrane, JoeJoe Magrane 2.18 St. Louis Cardinals Cone, DavidDavid Cone 2.22 [137]
1989 Garrelts, ScottScott Garrelts 2.28 San Francisco Giants Hershiser, OrelOrel Hershiser 2.31 [138]
1990 Darwin, DannyDanny Darwin 2.21 Houston Astros Smith, ZaneZane Smith 2.55 [139]
1991 Martinez, DennisDennis Martínez 2.39 Montreal Expos Rijo, JoseJosé Rijo 2.51 [140]
1992 Swift, BillBill Swift 2.08 San Francisco Giants Tewksbury, BobBob Tewksbury 2.16 [141]
1993 Maddux, GregGreg Maddux† 2.36 Atlanta Braves Rijo, JoseJosé Rijo 2.48 [142]
1994 Maddux, GregGreg Maddux† 1.56 Atlanta Braves Saberhagen, BretBret Saberhagen 2.74 [143]
1995 Maddux, GregGreg Maddux† 1.63 Atlanta Braves Nomo, HideoHideo Nomo 2.54 [144]
1996 Brown, KevinKevin Brown 1.89 Florida Marlins Maddux, GregGreg Maddux† 2.72 [145]
1997 Martinez, PedroPedro Martínez† 1.90 Montreal Expos Maddux, GregGreg Maddux† 2.20 [146]
1998 Maddux, GregGreg Maddux† 2.22 Atlanta Braves Brown, KevinKevin Brown 2.38 [147]
1999 Johnson, RandyRandy Johnson† 2.48 Arizona Diamondbacks Millwood, KevinKevin Millwood 2.68 [148]
2000 Brown, KevinKevin Brown 2.58 Los Angeles Dodgers Johnson, RandyRandy Johnson† 2.64 [149]
2001 Johnson, RandyRandy Johnson† 2.49 Arizona Diamondbacks Schilling, CurtCurt Schilling 2.98 [150]
2002 Johnson, RandyRandy Johnson† 2.32 Arizona Diamondbacks Maddux, GregGreg Maddux† 2.62 [151]
2003 Schmidt, JasonJason Schmidt 2.34 San Francisco Giants Brown, KevinKevin Brown 2.39 [152]
2004 Peavy, JakeJake Peavy 2.27 San Diego Padres Johnson, RandyRandy Johnson† 2.60 [153]
2005 Clemens, RogerRoger Clemens 1.87 Houston Astros Pettitte, AndyAndy Pettitte 2.39 [154]
2006 Oswalt, RoyRoy Oswalt 2.98 Houston Astros Carpenter, ChrisChris Carpenter 3.09 [155]
2007 Peavy, JakeJake Peavy 2.54 San Diego Padres Webb, BrandonBrandon Webb 3.01 [156]
2008 Santana, JohanJohan Santana 2.53 New York Mets Lincecum, TimTim Lincecum 2.62 [157]
2009 Carpenter, ChrisChris Carpenter 2.24 St. Louis Cardinals Lincecum, TimTim Lincecum 2.48 [158]
2010 Johnson, JoshJosh Johnson 2.30 Florida Marlins Wainwright, AdamAdam Wainwright 2.42 [159]
2011 Kershaw, ClaytonClayton Kershaw 2.28 Los Angeles Dodgers Halladay, RoyRoy Halladay 2.35 [160]
2012 Kershaw, ClaytonClayton Kershaw 2.53 Los Angeles Dodgers Dickey, R.A.R.A. Dickey 2.73 [161]
2013 Kershaw, ClaytonClayton Kershaw 1.83 Los Angeles Dodgers Fernández, JoséJosé Fernández 2.19 [162]
2014 Kershaw, ClaytonClayton Kershaw 1.77 Los Angeles Dodgers Cueto, JohnnyJohnny Cueto 2.25 [163]
2015 Greinke, ZackZack Greinke 1.66 Los Angeles Dodgers Arrieta, JakeJake Arrieta 1.77 [164]
2016 Hendricks, KyleKyle Hendricks 2.13 Chicago Cubs Lester, JonJon Lester 2.44 [165]

Notes

American League

A man with a lazy right eye is shown from the shoulders up. He is wearing a dark baseball cap on his head with a "C" on the front. His mouth is slightly open showing dirty teeth.
Addie Joss led the American League in ERA in 1904 and 1908.
A shoulders-up picture of a smiling man in a white baseball uniform. He is wearing a dark-colored baseball cap on his head with a white block "W" on the front.
In addition to leading the American League in ERA five times in his career and winning three triple crowns,[166] Walter Johnson was one of the five charter members of the Baseball Hall of Fame.
A man in a gray baseball uniform looks into the camera; he is wearing a gray baseball cap on his head and his jersey reads "Red Sox" in block type across the chest.
"Smoky" Joe Wood won 15 games in 1915 when he won the ERA title; he is one of thirteen pitchers who have won 30 games in a single season since 1900.[167]
A man in a white baseball uniform and white baseball cap follows through after throwing a baseball on a grass field.
Babe Ruth led the league in ERA in 1916; he began his Major League Baseball career as a pitcher with the Boston Red Sox before converting to the outfield.[168]
A man in a gray baseball uniform and navy blue baseball cap catches a baseball with his bare right hand. His jersey reads "NEW YORK" across the chest in navy blue letters, while his cap sports a white interlocked "NY".His face is heavily stubbled, and he wears a blue baseball glove on his left hand.
Roger Clemens' seven ERA championships are the second-most by any player in Major League Baseball history, behind Lefty Grove's nine.
A man with dark curly hair stands on a grass field. He is wearing a white baseball jersey with "RED SOX" across the chest in red type.
Pedro Martínez won five ERA titles across both leagues; his 2000 margin of victory over Clemens for the ERA title is the largest in Major League Baseball history.
A man in a white baseball uniform with red trim throws a baseball from a dirt mound on a grass field. Under his jersey, he is wearing a long-sleeved red shirt with the sleeves pushed up to his elbows. He wears a black baseball glove on his right hand and a red baseball cap on his head.
John Lackey's 3.01 ERA in 2007 led the American League.
A man in a gray baseball uniform and navy-blue cap follows through after throwing a baseball. He is standing with his right leg planted on a dirt mound within a grass field and his left leg raised in the air behind him.
Cliff Lee won the Cy Young Award in 2008[169] in addition to the ERA title.
A man in a gray baseball uniform and a blue baseball cap throws a baseball with his right hand. His jersey reads "Kansas City" across the chest in blue script, and "23" underneath in block print. He is wearing a black baseball glove on his left hand, and the blue sleeves of his long undershirt hang down over parts of his forearms.
Zack Greinke, pitching for the Kansas City Royals, became the second consecutive pitcher to win the Cy Young Award and lead the American League in ERA in the same season.[169]
Year Leader ERA Team Runner-up ERA Ref
1901 Young, CyCy Young† 1.62 Boston Americans Callahan, NixeyNixey Callahan 2.42 [170]
1902 Siever, EdEd Siever 1.91 Detroit Tigers Waddell, RubeRube Waddell† 2.05 [171]
1903 Moore, EarlEarl Moore 1.74 Cleveland Naps Young, CyCy Young† 2.08 [172]
1904 Joss, AddieAddie Joss† 1.59 Cleveland Naps Waddell, RubeRube Waddell† 1.62 [173]
1905 Waddell, RubeRube Waddell† 1.48 Philadelphia Athletics White, DocDoc White 1.76 [174]
1906 White, DocDoc White 1.52 Chicago White Sox Pelty, BarneyBarney Pelty 1.59 [175]
1907 Walsh, EdEd Walsh† 1.60 Chicago White Sox Killian, EdEd Killian 1.78 [176]
1908 Joss, AddieAddie Joss† 1.16 Cleveland Naps Young, CyCy Young† 1.26 [177]
1909 Krause, HarryHarry Krause 1.39 Philadelphia Athletics Walsh, EdEd Walsh† 1.41 [178]
1910 Walsh, EdEd Walsh† 1.27 Chicago White Sox Coombs, JackJack Coombs 1.30 [179]
1911 Gregg, VeanVean Gregg 1.80 Cleveland Naps Johnson, WalterWalter Johnson† 1.90 [180]
1912 Johnson, WalterWalter Johnson† 1.39 Washington Senators Wood, JoeJoe Wood 1.91 [181]
1913 Johnson, WalterWalter Johnson† 1.14 Washington Senators Cicotte, EddieEddie Cicotte 1.58 [182]
1914 Dutch LeonardDutch Leonard 0.96 Boston Red Sox Foster, RubeRube Foster 1.70 [183]
1915 Wood, JoeJoe Wood 1.49 Boston Red Sox Johnson, WalterWalter Johnson† 1.55 [184]
1916 Ruth, BabeBabe Ruth† 1.75 Boston Red Sox Cicotte, EddieEddie Cicotte 1.78 [185]
1917 Cicotte, EddieEddie Cicotte 1.53 Chicago White Sox Mays, CarlCarl Mays 1.74 [186]
1918 Johnson, WalterWalter Johnson† 1.27 Washington Senators Coveleski, StanStan Coveleski† 1.82 [187]
1919 Johnson, WalterWalter Johnson† 1.49 Washington Senators Cicotte, EddieEddie Cicotte 1.82 [188]
1920 Shawkey, BobBob Shawkey 2.45 New York Yankees Coveleski, StanStan Coveleski† 2.49 [189]
1921 Faber, RedRed Faber† 2.48 Chicago White Sox Mogridge, GeorgeGeorge Mogridge 3.00 [190]
1922 Faber, RedRed Faber† 2.81 Chicago White Sox Pillette, HermanHerman Pillette 2.85 [191]
1923 Coveleski, StanStan Coveleski† 2.76 Washington Senators Hoyt, WaiteWaite Hoyt† 3.02 [192]
1924 Johnson, WalterWalter Johnson† 2.72 Washington Senators Zachary, TomTom Zachary 2.75 [193]
1925 Coveleski, StanStan Coveleski† 2.84 Washington Senators Pennock, HerbHerb Pennock† 2.96 [194]
1926 Grove, LeftyLefty Grove† 2.51 Philadelphia Athletics Uhle, GeorgeGeorge Uhle 2.83 [195]
1927 Moore, WilcyWilcy Moore 2.28 New York Yankees Hoyt, WaiteWaite Hoyt† 2.63 [196]
1928 Braxton, GarlandGarland Braxton 2.51 Washington Senators Pennock, HerbHerb Pennock† 2.56 [197]
1929 Grove, LeftyLefty Grove† 2.81 Philadelphia Athletics Marberry, FirpoFirpo Marberry 3.06 [198]
1930 Grove, LeftyLefty Grove† 2.54 Philadelphia Athletics Ferrell, WesWes Ferrell 3.31 [199]
1931 Grove, LeftyLefty Grove† 2.06 Philadelphia Athletics Gomez, LeftyLefty Gomez† 2.67 [200]
1932 Grove, LeftyLefty Grove† 2.84 Philadelphia Athletics Ruffing, RedRed Ruffing† 3.09 [201]
1933 Harder, MelMel Harder 2.95 Cleveland Indians Bridges, TommyTommy Bridges 3.09 [202]
1934 Gomez, LeftyLefty Gomez† 2.33 New York Yankees Harder, MelMel Harder 2.61 [203]
1935 Grove, LeftyLefty Grove† 2.70 Boston Red Sox Lyons, TedTed Lyons† 3.02 [204]
1936 Grove, LeftyLefty Grove† 2.81 Boston Red Sox Allen, JohnnyJohnny Allen 3.44 [205]
1937 Gomez, LeftyLefty Gomez† 2.33 New York Yankees Stratton, MontyMonty Stratton 2.40 [206]
1938 Grove, LeftyLefty Grove† 3.08 Boston Red Sox Ruffing, RedRed Ruffing† 3.31 [207]
1939 Grove, LeftyLefty Grove† 2.54 Boston Red Sox Lyons, TedTed Lyons† 2.76 [208]
1940 Feller, BobBob Feller† 2.61 Cleveland Indians Newsom, BoboBobo Newsom 2.83 [209]
1941 Lee, ThorntonThornton Lee 2.37 Chicago White Sox Benton, AlAl Benton 2.97 [210]
1942 Lyons, TedTed Lyons† 2.10 Chicago White Sox Bonham, TinyTiny Bonham 2.27 [211]
1943 Chandler, SpudSpud Chandler 1.64 New York Yankees Bonham, TinyTiny Bonham 2.27 [212]
1944 Trout, DizzyDizzy Trout 2.12 Detroit Tigers Newhouser, HalHal Newhouser† 2.22 [213]
1945 Newhouser, HalHal Newhouser† 1.81 Detroit Tigers Benton, AlAl Benton 2.02 [214]
1946 Newhouser, HalHal Newhouser† 1.94 Detroit Tigers Chandler, SpudSpud Chandler 2.10 [215]
1947 Haynes, JoeJoe Haynes 2.42 Chicago White Sox Feller, BobBob Feller† 2.68 [216]
1948 Bearden, GeneGene Bearden 2.43 Cleveland Indians Scarborough, RayRay Scarborough 2.82[a] [217]
1949 Garcia, MikeMike Garcia 2.36 Cleveland Indians Parnell, MelMel Parnell 2.77 [218]
1950 Wynn, EarlyEarly Wynn† 3.20 Cleveland Indians Garver, NedNed Garver 3.39 [219]
1951 Rogovin, SaulSaul Rogovin 2.78 Chicago White Sox
Detroit Tigers 		Lopat, EdEd Lopat 2.91 [220]
1952 Reynolds, AllieAllie Reynolds 2.06 New York Yankees Garcia, MikeMike Garcia 2.37 [221]
1953 Lopat, EdEd Lopat 2.42 New York Yankees Pierce, BillyBilly Pierce 2.72 [222]
1954 Garcia, MikeMike Garcia 2.64 Cleveland Indians Consuegra, SandySandy Consuegra 2.69 [223]
1955 Pierce, BillyBilly Pierce 1.97 Chicago White Sox Ford, WhiteyWhitey Ford† 2.63 [224]
1956 Ford, WhiteyWhitey Ford† 2.47 New York Yankees Score, HerbHerb Score 2.53 [225]
1957 Shantz, BobbyBobby Shantz 2.45 New York Yankees Sturdivant, TomTom Sturdivant 2.54 [226]
1958 Ford, WhiteyWhitey Ford† 2.01 New York Yankees Pierce, BillyBilly Pierce 2.68 [227]
1959 Wilhelm, HoytHoyt Wilhelm† 2.19 Baltimore Orioles Pascual, CamiloCamilo Pascual 2.64 [228]
1960 Baumann, FrankFrank Baumann 2.67 Chicago White Sox Bunning, JimJim Bunning† 2.79 [229]
1961 Donovan, DickDick Donovan 2.40 Washington Senators Stafford, BillBill Stafford 2.68 [230]
1962 Aguirre, HankHank Aguirre 2.21 Detroit Tigers Roberts, RobinRobin Roberts† 2.78 [231]
1963 Peters, GaryGary Peters 2.33 Chicago White Sox Pizarro, JuanJuan Pizarro 2.39 [232]
1964 Chance, DeanDean Chance 1.65 Los Angeles Angels Horlen, JoeJoe Horlen 1.88 [233]
1965 McDowell, SamSam McDowell 2.18 Cleveland Indians Fisher, EddieEddie Fisher 2.40 [234]
1966 Peters, GaryGary Peters 1.98 Chicago White Sox Horlen, JoeJoe Horlen 2.43 [235]
1967 Horlen, JoeJoe Horlen 2.06 Chicago White Sox Peters, GaryGary Peters 2.28 [236]
1968 Tiant, LuisLuis Tiant 1.60 Cleveland Indians McDowell, SamSam McDowell 1.81 [237]
1969 Bosman, DickDick Bosman 2.19 Washington Senators Palmer, JimJim Palmer† 2.34 [238]
1970 Segui, DiegoDiego Seguí 2.56 Oakland Athletics Palmer, JimJim Palmer† 2.71 [239]
1971 Blue, VidaVida Blue 1.82 Oakland Athletics Wood, WilburWilbur Wood 1.91 [240]
1972 Tiant, LuisLuis Tiant 1.91 Boston Red Sox Perry, GaylordGaylord Perry† 1.92 [241]
1973 Palmer, JimJim Palmer† 2.40 Baltimore Orioles Blyleven, BertBert Blyleven† 2.52 [242]
1974 Hunter, CatfishCatfish Hunter† 2.49 Oakland Athletics Perry, GaylordGaylord Perry† 2.51 [243]
1975 Palmer, JimJim Palmer† 2.09 Baltimore Orioles Hunter, CatfishCatfish Hunter† 2.58 [244]
1976 Fidrych, MarkMark Fidrych 2.34 Detroit Tigers Blue, VidaVida Blue 2.35 [245]
1977 Tanana, FrankFrank Tanana 2.54 California Angels Blyleven, BertBert Blyleven† 2.72 [246]
1978 Guidry, RonRon Guidry 1.74 New York Yankees Matlack, JonJon Matlack 2.27 [247]
1979 Guidry, RonRon Guidry 2.78 New York Yankees John, TommyTommy John 2.96 [248]
1980 May, RudyRudy May 2.46 New York Yankees Norris, MikeMike Norris 2.53 [249]
1981 Stewart, SammySammy Stewart 2.32 [d] Baltimore Orioles McCatty, SteveSteve McCatty 2.33 [250]
1982 Sutcliffe, RickRick Sutcliffe 2.96 Cleveland Indians Stanley, BobBob Stanley 3.10 [251]
1983 Honeycutt, RickRick Honeycutt 2.42 Texas Rangers Boddicker, MikeMike Boddicker 2.77 [252]
1984 Boddicker, MikeMike Boddicker 2.79 Baltimore Orioles Stieb, DaveDave Stieb 2.83 [253]
1985 Stieb, DaveDave Stieb 2.48 Toronto Blue Jays Leibrandt, CharlieCharlie Leibrandt 2.69 [254]
1986 Clemens, RogerRoger Clemens 2.48 Boston Red Sox Higuera, TeddyTeddy Higuera 2.79 [255]
1987 Key, JimmyJimmy Key 2.76 Toronto Blue Jays Viola, FrankFrank Viola 2.90 [256]
1988 Anderson, AllanAllan Anderson 2.45[b] Minnesota Twins Higuera, TeddyTeddy Higuera 2.45[c] [257]
1989 Saberhagen, BretBret Saberhagen 2.16 Kansas City Royals Finley, ChuckChuck Finley 2.57 [258]
1990 Clemens, RogerRoger Clemens 1.93 Boston Red Sox Finley, ChuckChuck Finley 2.40 [259]
1991 Clemens, RogerRoger Clemens 2.62 Boston Red Sox Candiotti, TomTom Candiotti 2.65 [260]
1992 Clemens, RogerRoger Clemens 2.41 Boston Red Sox Appier, KevinKevin Appier 2.46 [261]
1993 Appier, KevinKevin Appier 2.56 Kansas City Royals Álvarez, WilsonWilson Álvarez 2.95 [262]
1994 Ontiveros, SteveSteve Ontiveros 2.65 Oakland Athletics Clemens, RogerRoger Clemens 2.85 [263]
1995 Johnson, RandyRandy Johnson† 2.48 Seattle Mariners Wakefield, TimTim Wakefield 2.95 [264]
1996 Guzman, JuanJuan Guzmán 2.93 Toronto Blue Jays Hentgen, PatPat Hentgen 3.22 [265]
1997 Clemens, RogerRoger Clemens 2.05 Toronto Blue Jays Johnson, RandyRandy Johnson† 2.28 [266]
1998 Clemens, RogerRoger Clemens 2.65 Toronto Blue Jays Martinez, PedroPedro Martínez† 2.89 [267]
1999 Martinez, PedroPedro Martínez† 2.07 Boston Red Sox Cone, DavidDavid Cone 3.44 [268]
2000 Martinez, PedroPedro Martínez† 1.74 Boston Red Sox Clemens, RogerRoger Clemens 3.70 [269]
2001 Garcia, FreddyFreddy García 3.05 Seattle Mariners Mussina, MikeMike Mussina 3.15 [270]
2002 Martinez, PedroPedro Martínez† 2.26 Boston Red Sox Lowe, DerekDerek Lowe 2.58 [271]
2003 Martinez, PedroPedro Martínez† 2.22 Boston Red Sox Hudson, TimTim Hudson 2.70 [272]
2004 Santana, JohanJohan Santana 2.61 Minnesota Twins Schilling, CurtCurt Schilling 3.26 [273]
2005 Millwood, KevinKevin Millwood 2.86 Cleveland Indians Santana, JohanJohan Santana 2.87 [274]
2006 Santana, JohanJohan Santana 2.77 Minnesota Twins Halladay, RoyRoy Halladay 3.19 [275]
2007 Lackey, JohnJohn Lackey 3.01 Los Angeles Angels of Anaheim Carmona, FaustoFausto Carmona 3.06 [276]
2008 Lee, CliffCliff Lee 2.54 Cleveland Indians Halladay, RoyRoy Halladay 2.78 [277]
2009 Greinke, ZackZack Greinke 2.16 Kansas City Royals Hernandez, FelixFélix Hernández 2.49 [278]
2010 Hernandez, FelixFélix Hernández 2.27 Seattle Mariners Buchholz, ClayClay Buchholz 2.33 [279]
2011 Verlander, JustinJustin Verlander 2.40 Detroit Tigers Weaver, JeredJered Weaver 2.41 [280]
2012 Price, DavidDavid Price 2.56 Tampa Bay Rays Verlander, JustinJustin Verlander 2.64 [281]
2013 Sánchez, AníbalAníbal Sánchez 2.57 Detroit Tigers Colón, BartoloBartolo Colón 2.65 [282]
2014 Hernandez, FelixFelix Hernandez 2.14 Seattle Mariners Sale, ChrisChris Sale 2.17 [283]
2015 Price, DavidDavid Price 2.45 Detroit Tigers
Toronto Blue Jays 		Keuchel, DallasDallas Keuchel 2.48 [284]
2016 Sanchez, AaronAaron Sanchez 3.00 Toronto Blue Jays Verlander, JustinJustin Verlander 3.04 [285]

Notes

Other major leagues

A man in a light-colored baseball uniform and baseball cap looks to the right of the image. He has a long face with a strong nose and chin, along with short hair seen under the band of his cap.
Eddie Plank (pictured) was the runner-up in ERA to Earl Moseley in the Federal League's last season of play.
Year Leader ERA Team League Runner-up ERA Ref
1882 Driscoll, DennyDenny Driscoll 1.21 Pittsburgh Alleghenys American Association Hecker, GuyGuy Hecker 1.30 [287]
1883 White, WillWill White 2.09 Cincinnati Red Stockings American Association Mullane, TonyTony Mullane 2.19 [288]
1884 Hecker, GuyGuy Hecker 1.80 Louisville Eclipse American Association Foutz, DaveDave Foutz 2.18 [289]
1884 McCormick, JimJim McCormick 1.54 Cincinnati Outlaw Reds Union Association Taylor, BillyBilly Taylor 1.68 [290]
1885 Caruthers, BobBob Caruthers 2.07 St. Louis Browns American Association Hecker, GuyGuy Hecker 2.18 [291]
1886 Foutz, DaveDave Foutz 2.11 St. Louis Browns American Association Caruthers, BobBob Caruthers 2.32 [292]
1887 Smith, ElmerElmer Smith 2.94 Cincinnati Red Stockings American Association Kilroy, MattMatt Kilroy 3.07 [293]
1888 King, SilverSilver King 1.63 St. Louis Browns American Association Seward, EdEd Seward 2.01 [294]
1889 Stivetts, JackJack Stivetts 2.25 St. Louis Browns American Association Duryea, JesseJesse Duryea 2.56 [295]
1890 Stratton, ScottScott Stratton 2.36 Louisville Colonels American Association Ehret, RedRed Ehret 2.53 [296]
1890 King, SilverSilver King 2.69 Chicago Pirates Players' League Staley, HarryHarry Staley 3.23 [297]
1891 Crane, EdEd Crane 2.45 Cincinnati Kelly's Killers American Association Haddock, GeorgeGeorge Haddock 2.49 [298]
1914 Hendrix, ClaudeClaude Hendrix 1.69 Chicago Chi-Feds Federal League Ford, RussRuss Ford 1.82 [299]
1915 Moseley, EarlEarl Moseley 1.91 Newark Pepper Federal League Plank, EddieEddie Plank† 2.08 [300]

Footnotes

See also

References

General
Inline citations
  1. ↑ "Career Leaders & Records for Earned Run Average". Baseball-Reference.com. Retrieved February 22, 2010.
  2. 1 2 Formosa, Dan; Hamburger, Paul (2006). Baseball field guide: an in-depth illustrated guide to the complete rules of baseball. Thunder's Mouth Press. p. 228. ISBN 1-56025-700-8.
  3. 1 2 "The Rules of Scoring: Earned Runs and Runs Allowed" (PDF). Major League Baseball. pp. 114–118. Retrieved February 17, 2010.
  4. ↑ "George Bradley Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  5. ↑ "Cy Young Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  6. ↑ "Lefty Grove Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  7. ↑ "Roger Clemens Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  8. ↑ "Sandy Koufax Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  9. ↑ "Christy Mathewson Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  10. ↑ "Walter Johnson Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  11. ↑ "Pedro Martinez Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  12. ↑ "Tim Keefe Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  13. ↑ "Dutch Leonard Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
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  15. ↑ "Major League Single Season Leaders". Retrosheet, Inc. Retrieved February 17, 2010.
  16. ↑ "Historical Leaders (ERA in a Single Season)". Major League Baseball. Retrieved February 17, 2010.
  17. ↑ "Allan Anderson Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  18. ↑ "Teddy Higuera Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  19. ↑ "Luis Tiant Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  20. ↑ "Gaylord Perry Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  21. ↑ "Mark Fidrych Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  22. ↑ "Vida Blue Statistics and History". Baseball-Reference.com. Retrieved February 17, 2010.
  23. ↑ "Tommy Bond Statistics and History". Baseball-Reference.com. Retrieved February 22, 2010.
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  26. ↑ "1877 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  27. ↑ "1878 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  28. ↑ "1879 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  29. ↑ "1880 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  30. ↑ "1881 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  31. ↑ "1882 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  32. ↑ "1883 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  33. ↑ "1884 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  34. ↑ "1885 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  35. ↑ "1886 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  36. ↑ "1887 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  37. ↑ "1888 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  38. ↑ "1889 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  39. ↑ "1890 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  40. ↑ "1891 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  41. ↑ "1892 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  42. ↑ "1893 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  43. ↑ "1894 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  44. ↑ "1895 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
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  46. ↑ "1897 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  47. ↑ "1898 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  48. ↑ "1899 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  49. ↑ "1900 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  50. ↑ "1901 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  51. ↑ "1902 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  52. ↑ "1903 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  53. ↑ "1904 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  54. ↑ "1905 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  55. ↑ "1906 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  56. ↑ "1907 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  57. ↑ "1908 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  58. ↑ "1909 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  59. ↑ "1910 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  60. ↑ "1911 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  61. ↑ "1912 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  62. ↑ "1913 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  63. ↑ "1914 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  64. ↑ "1915 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  65. ↑ "1916 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  66. ↑ "1917 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  67. ↑ "1918 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  68. ↑ "1919 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  69. ↑ "1920 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  70. ↑ "1921 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  71. ↑ "1922 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  72. ↑ "1923 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  73. ↑ "1924 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  74. ↑ "1925 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  75. ↑ "1926 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  76. ↑ "1927 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  77. ↑ "1928 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  78. ↑ "1929 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  79. ↑ "1930 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  80. ↑ "1931 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  81. ↑ "1932 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  82. ↑ "1933 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  83. ↑ "1934 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  84. ↑ "1935 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  85. ↑ "1936 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  86. ↑ "1937 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  87. ↑ "1938 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  88. ↑ "1939 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  89. ↑ "1940 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  90. ↑ "1941 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  91. ↑ "1942 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  92. ↑ "1943 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  93. ↑ "1944 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  94. ↑ "1945 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  95. ↑ "1946 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  96. ↑ "1947 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  97. ↑ "1948 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  98. ↑ "1949 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  99. ↑ "1950 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  100. ↑ "1951 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  101. ↑ "1952 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  102. ↑ "1953 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  103. ↑ "1954 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  104. ↑ "1955 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  105. ↑ "1956 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  106. ↑ "1957 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  107. ↑ "1958 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  108. ↑ "1959 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  109. ↑ "1960 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  110. ↑ "1961 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  111. ↑ "1962 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  112. ↑ "1963 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  113. ↑ "1964 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  114. ↑ "1965 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  115. ↑ "1966 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  116. ↑ "1967 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  117. ↑ "1968 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  118. ↑ "1969 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  119. ↑ "1970 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  120. ↑ "1971 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  121. ↑ "1972 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  122. ↑ "1973 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  123. ↑ "1974 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  124. ↑ "1975 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  125. ↑ "1976 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  126. ↑ "1977 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  127. ↑ "1978 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  128. ↑ "1979 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  129. ↑ "1980 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  130. ↑ "1981 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  131. ↑ "1982 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  132. ↑ "1983 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  133. ↑ "1984 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  134. ↑ "1985 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  135. ↑ "1986 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  136. ↑ "1987 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  137. ↑ "1988 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  138. ↑ "1989 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  139. ↑ "1990 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  140. ↑ "1991 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  141. ↑ "1992 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  142. ↑ "1993 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  143. ↑ "1994 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  144. ↑ "1995 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  145. ↑ "1996 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  146. ↑ "1997 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  147. ↑ "1998 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  148. ↑ "1999 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  149. ↑ "2000 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  150. ↑ "2001 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  151. ↑ "2002 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  152. ↑ "2003 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  153. ↑ "2004 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  154. ↑ "2005 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  155. ↑ "2006 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  156. ↑ "2007 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  157. ↑ "2008 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  158. ↑ "2009 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  159. ↑ "2010 National League Pitching Leaders". Baseball-Reference.com. Retrieved October 7, 2010.
  160. ↑ "2011 National League Pitching Leaders". Baseball-Reference.com. Retrieved September 29, 2011.
  161. ↑ "2012 National League Pitching Leaders". Baseball-Reference.com. Retrieved October 4, 2012.
  162. ↑ "2013 National League Pitching Leaders". Baseball-Reference.com. Retrieved September 30, 2013.
  163. ↑ "2014 National League Pitching Leaders". Baseball-Reference.com. Retrieved September 24, 2014.
  164. ↑ "2015 National League Pitching Leaders". Baseball-Reference.com. Retrieved October 5, 2015.
  165. ↑ "2016 National League Pitching Leaders". Baseball-Reference.com. Retrieved October 2, 2016.
  166. ↑ "The Fans Speak Out". Baseball Digest. Lakeside. 57 (7): 8. July 1998. ISSN 0005-609X.
  167. ↑ "Single-Season Leaders & Records for Wins". Baseball-Reference.com. Retrieved February 22, 2010.
  168. ↑ "Babe Ruth Statistics and History". Baseball-Reference.com. Retrieved February 22, 2010.
  169. 1 2 "Most Valuable Player MVP Awards & Cy Young Awards Winners". Baseball-Reference.com. Retrieved February 22, 2010.
  170. ↑ "1901 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  171. ↑ "1902 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  172. ↑ "1903 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  173. ↑ "1904 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
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  175. ↑ "1906 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  176. ↑ "1907 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  177. ↑ "1908 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  178. ↑ "1909 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  179. ↑ "1910 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  180. ↑ "1911 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  181. ↑ "1912 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  182. ↑ "1913 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  183. ↑ "1914 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  184. ↑ "1915 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  185. ↑ "1916 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  186. ↑ "1917 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  187. ↑ "1918 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  188. ↑ "1919 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  189. ↑ "1920 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  190. ↑ "1921 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  191. ↑ "1922 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  192. ↑ "1923 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  193. ↑ "1924 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  194. ↑ "1925 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  195. ↑ "1926 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  196. ↑ "1927 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  197. ↑ "1928 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  198. ↑ "1929 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  199. ↑ "1930 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  200. ↑ "1931 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  201. ↑ "1932 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  202. ↑ "1933 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  203. ↑ "1934 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  204. ↑ "1935 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  205. ↑ "1936 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  206. ↑ "1937 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  207. ↑ "1938 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  208. ↑ "1939 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  209. ↑ "1940 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  210. ↑ "1941 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  211. ↑ "1942 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  212. ↑ "1943 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  213. ↑ "1944 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  214. ↑ "1945 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  215. ↑ "1946 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  216. ↑ "1947 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  217. ↑ "1948 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  218. ↑ "1949 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  219. ↑ "1950 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  220. ↑ "1951 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  221. ↑ "1952 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  222. ↑ "1953 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  223. ↑ "1954 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  224. ↑ "1955 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  225. ↑ "1956 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  226. ↑ "1957 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  227. ↑ "1958 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  228. ↑ "1959 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  229. ↑ "1960 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  230. ↑ "1961 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  231. ↑ "1962 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  232. ↑ "1963 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  233. ↑ "1964 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  234. ↑ "1965 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  235. ↑ "1966 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  236. ↑ "1967 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  237. ↑ "1968 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  238. ↑ "1969 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  239. ↑ "1970 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  240. ↑ "1971 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  241. ↑ "1972 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  242. ↑ "1973 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  243. ↑ "1974 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  244. ↑ "1975 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  245. ↑ "1976 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  246. ↑ "1977 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  247. ↑ "1978 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  248. ↑ "1979 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  249. ↑ "1980 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  250. ↑ "1981 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  251. ↑ "1982 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  252. ↑ "1983 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  253. ↑ "1984 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  254. ↑ "1985 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  255. ↑ "1986 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  256. ↑ "1987 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  257. ↑ "1988 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  258. ↑ "1989 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  259. ↑ "1990 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  260. ↑ "1991 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  261. ↑ "1992 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  262. ↑ "1993 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  263. ↑ "1994 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  264. ↑ "1995 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  265. ↑ "1996 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  266. ↑ "1997 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  267. ↑ "1998 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  268. ↑ "1999 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  269. ↑ "2000 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  270. ↑ "2001 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  271. ↑ "2002 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  272. ↑ "2003 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  273. ↑ "2004 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  274. ↑ "2005 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  275. ↑ "2006 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  276. ↑ "2007 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  277. ↑ "2008 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  278. ↑ "2009 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  279. ↑ "2010 American League Pitching Leaders". Baseball-Reference.com. Retrieved October 7, 2010.
  280. ↑ "2011 American League Pitching Leaders". Baseball-Reference.com. Retrieved September 29, 2011.
  281. ↑ "2012 American League Pitching Leaders". Baseball-Reference.com. Retrieved October 4, 2012.
  282. ↑ "2013 American League Pitching Leaders". Baseball-Reference.com. Retrieved September 30, 2013.
  283. ↑ "2014 American League Pitching Leaders". Baseball-Reference.com. Sports REference LLC. Retrieved September 28, 2014.
  284. ↑ "2015 American League Pitching Leaders". Baseball-Reference.com. Sports REference LLC. Retrieved October 5, 2015.
  285. ↑ "2016 American League Pitching Leaders". Baseball-Reference.com. Sports REference LLC. Retrieved October 2, 2016.
  286. ↑ http://sabr.org/research/choosing-among-winners-1981-al-era-title
  287. ↑ "1882 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  288. ↑ "1883 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  289. ↑ "1884 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  290. ↑ "1884 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  291. ↑ "1885 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  292. ↑ "1886 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  293. ↑ "1887 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  294. ↑ "1888 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  295. ↑ "1889 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  296. ↑ "1890 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  297. ↑ "1890 Players' League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  298. ↑ "1891 American Association Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  299. ↑ "1914 Federal League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  300. ↑ "1915 Federal League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.
  301. ↑ "Complete Baseball Team and Baseball Team Encyclopedias". Baseball-Reference.com. Retrieved March 16, 2010.
  302. ↑ "Official Rules: 10.00 The Official Scorer". Major League Baseball. Retrieved March 2, 2010.

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