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League Index
 
Bold indicates World Championship Champion
 
Lg LgAvg LgERA Champion Year Champion LgERA LgAvg Lg
AL .282 4.37 Cleveland Indians 1930 Houston Astros 4.21 .281 NL
AL .277 4.29 Oakland Athletics 1931 Houston Astros 4.24 .282 NL
AL .283 4.49 Minnesota Twins 1932 Pittsburgh Pirates 4.31 .288 NL
AL .287 4.66 Tampa Bay Devil Rays 1933 Montreal Expos 4.30 .283 NL
AL .285 4.63 Detroit Tigers 1934 Montreal Expos 4.48 .287 NL
AL .279 4.53 Seattle (M) Mariners 1935 New York (G) Giants 4.29 .284 NL
AL .277 4.50 Boston (A) Red Sox 1936 Montreal Expos 4.48 .285 NL
AL .278 4.22 Boston (A) Red Sox 1937 New York (G) Giants 4.14 .272 NL
AL .275 4.28 Seattle (M) Mariners 1938 Cincinnati Reds 4.17 .278 NL
AL .273 4.18 Seattle (M) Mariners 1939 New York (G) Giants 3.97 .272 NL
AL .274 4.22 Seattle (M) Mariners 1940 San Diego Padres 4.12 .266 NL
AL .275 4.26 Detroit Tigers 1941 San Diego Padres 4.20 .271 NL
AL .272 4.36 Oakland Athletics 1942 Cincinnati Reds 4.31 .275 NL
AL .273 4.47 New York (A) Yankees 1943 Cincinnati Reds 4.26 .272 NL
AL .268 4.57 Tampa Bay Devil Rays 1944 Cincinnati Reds 4.23 .271 NL
AL .262 4.25 Tampa Bay Devil Rays 1945 Brooklyn Dodgers 4.22 .259 NL
AL .267 4.38 Detroit Tigers 1946 Cincinnati Reds 4.24 .264 NL
AL .263 4.41 Detroit Tigers 1947 Cincinnati Reds 4.33 .264 NL
AL .262 4.88 Boston (A) Red Sox 1948 New York (N) Giants 4.38 .270 NL
AL .273 4.88 Tampa Bay Devil Rays 1949 Montreal Expos 4.36 .264 NL
AL .270 4.77 Seattle Mariners 1950 San Diego Padres 4.63 .262 NL
AL .270 4.72 Detroit Tigers 1951 Montreal Expos 4.81 .266 NL
AL .269 4.65 Detroit Tigers 1952 Pittsburgh Pirates 4.47 .265 NL
AL .260 4.36 Tampa Bay Devil Rays 1953 Montreal Expos 4.32 .260 NL
AL .261 4.28 Minnesota Twins 1954 St. Louis Cardinals 4.58 .257 NL
AL .257 4.38 Minnesota Twins 1955 St. Louis Cardinals 4.28 .259 NL
AL .253 4.35 Tampa Bay Devil Rays 1956 New York (N) Giants 4.18 .255 NL
AL .249 4.13 Tampa Bay Devil Rays 1957 New York (N) Giants 4.15 .257 NL
AL .257 4.23 Boston (A) Red Sox 1958 New York (N) Giants 4.18 .255 NL
AL .249 3.99 Tampa Bay Devil Rays 1959 Montreal Expos 4.13 .252 NL
Lg LgAvg LgERA Champion Year Champion LgERA LgAvg Lg
AL .246 3.93 Cleveland Indians 1960 Montreal Expos 4.00 .251 NL
AL .246 3.75 Oakland Athletics 1961 Montreal Expos 3.92 .251 NL
AL .249 3.80 Seattle Mariners 1962 Pittsburgh Pirates 3.60 .251 NL
AL .250 3.75 Boston (A) Red Sox 1963 Montreal Expos 3.72 .248 NL
AL .245 3.71 Cleveland (A) Indians 1964 St. Louis Cardinals 3.75 .254 NL
AL .246 3.61 Seattle Mariners 1965 Montreal Expos 3.64 .251 NL
AL .246 3.94 Seattle Mariners 1966 Cleveland (N) Spiders 3.67 .253 NL
AL .250 3.91 Kansas City Royals 1967 New York (N) Giants 3.76 .251 NL
AL .246 3.73 Seattle Mariners 1968 Cleveland (N) Spiders 3.74 .250 NL
AL .251 3.96 Boston (A) Red Sox 1969 Colorado Rockies 4.12 .261 NL
AL .251 4.07 Oakland Athletics 1970 Los Angeles Dodgers 4.15 .261 NL
AL .255 4.16 Seattle Mariners 1971 Montreal Expos 4.16 .257 NL
AL .266 4.27 Seattle Mariners 1972 Cleveland (N) Spiders 4.19 .257 NL
AL .266 4.49 Oakland Athletics 1973 Montreal Expos 4.16 .263 NL
AL .269 4.70 New York (A) Yankees 1974 Colorado Rockies 4.20 .267 NL
AL .268 4.45 Seattle Mariners 1975 Montreal Expos 4.23 .266 NL
AL .262 4.32 Kansas City Royals 1976 Colorado Rockies 4.32 .266 NL
AL .266 4.32 Kansas City Royals 1977 Colorado Rockies 3.99 .263 NL
AL .263 4.12 Seattle Mariners 1978 San Diego Padres 4.04 .260 NL
AL .258 4.09 Seattle Mariners 1979 Los Angeles Dodgers 3.89 .262 NL
AL .261 4.15 Detroit Tigers 1980 San Diego Padres 3.85 .260 NL
AL .264 4.09 Detroit Tigers 1981 New York (N) Giants 3.74 .257 NL
AL .258 3.93 Cleveland (A) Indians 1982 Cleveland (N) Spiders 3.96 .264 NL
AL .263 4.02 Indianapolis Hoosiers 1983 Philadelphia Phillies 3.91 .257 NL
AL .262 4.03 Oakland Athletics 1984 Colorado Rockies 3.87 .255 NL
AL .258 4.02 Cleveland (A) Indians 1985 Cleveland (N) Spiders 3.78 .252 NL
AL .262 4.11 Tampa Bay Devil Rays 1986 Colorado Rockies 4.05 .256 NL
AL .263 4.23 Boston (A) Red Sox 1987 San Diego Padres 4.03 .260 NL
AL .259 4.17 Baltimore Orioles 1988 New York (N) Giants 4.05 .257 NL
AL .256 4.12 Toronto Blue Jays 1989 New York (N) Giants 4.01 .254 NL
Lg LgAvg LgERA Champion Year Champion LgERA LgAvg Lg
AL .261 4.27 Minnesota Twins 1990 Washington Nationals 4.22 .261 NL
 
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