League Index
 
Bold indicates WORLD SERIES Champion
 
Lg LgAvg LgERA Champion Year Champion LgERA LgAvg Lg
AL .270 3.40 Detroit Tigers
1901 Brooklyn Superbas
3.65 .267 NL
AL .267 3.50 Detroit Tigers
1902 Brooklyn Superbas
3.63 .268 NL
AL .258 3.40 Boston (A) Pilgrims 1903 Chicago (N) Cubs 3.44 .261 NL
AL .243 3.17 Washington Senators
1904 St. Louis (N) Cardinals
3.10 .246 NL
AL .244 3.15 Detroit Tigers 1905 Chicago (N) Cubs 3.18 .249 NL
AL .248 3.22 New York (A) Highlanders 1906 Chicago (N) Cubs 3.21 .252 NL
AL .242 3.16 Cleveland Naps 1907 Chicago (N) Cubs 3.33 .248 NL
AL .239 2.99 St. Louis (A) Browns 1908 Chicago (N) Cubs 2.86 .236 NL
AL .243 3.07 Chicago (A) White Sox 1909 Philadelphia (N) Phillies 3.03 .243 NL
AL .252 3.45 Boston (A) Red Sox 1910 Chicago (N) Cubs 3.14 .249 NL
AL .261 3.73 St. Louis (A) Browns 1911 Chicago (N) Cubs 3.71 .265 NL
AL .267 3.81 St. Louis (A) Browns 1912 Philadelphia (N) Phillies 3.82 .271 NL
AL .252 3.60 Washington Senators 1913 Pittsburgh Pirates 3.47 .258 NL
AL .249 3.43 Boston (A) Red Sox 1914 New York (N) Giants 3.36 .251 NL
AL .249 3.46 Washington Senators 1915 Cincinnati Reds 3.21 .248 NL
AL .243 3.14 Washington Senators 1916 New York (N) Giants 3.24 .255 NL
AL .242 3.07 Washington Senators 1917 Cincinnati Reds 3.19 .253 NL
AL .252 3.33 Philadelphia (A) Athletic 1918 Cincinnati Reds 3.37 .255 NL
AL .263 3.62 New York (A) Yankees 1919 Cincinnati Reds 3.45 .261 NL
AL .279 4.20 Philadelphia (A) Athletic 1920 Boston (N) Braves 4.04 .277 NL
AL .286 4.47 New York (A) Yankees 1921 New York (N) Giants 4.62 .293 NL
AL .289 4.65 Washington Senators 1922 Brooklyn Dodgers 4.35 .286 NL
AL .286 4.62 New York (A) Yankees 1923 Brooklyn Dodgers 4.28 .282 NL
AL .290 4.76 New York (A) Yankees 1924 Chicago (N) Cubs 4.26 .287 NL
AL .294 5.09 Cleveland Indians 1925 New York (N) Giants 4.61 .291 NL
AL .279 4.42 St. Louis (A) Browns 1926 New York (N) Giants 4.38 .285 NL
AL .278 4.40 Chicago (A) White Sox 1927 Chicago (N) Cubs 4.63 .288 NL
AL .281 4.65 Washington Senators 1928 Chicago (N) Cubs 4.45 .281 NL
AL .286 4.92 Detroit Tigers 1929 Cincinnati Reds 5.00 .291 NL
AL .290 5.05 Washington Senators 1930 Boston (N) Braves 5.31 .302 NL
Lg LgAvg LgERA Champion Year Champion LgERA LgAvg Lg
AL .277 4.33 Detroit Tigers 1931 Boston (N) Braves 4.50 .278 NL
AL .275 4.28 Detroit Tigers 1932 St. Louis (N) Cardinals 4.65 .278 NL
AL .271 4.05 Boston (A) Red Sox 1933 Cincinnati Reds 4.05 .270 NL
AL .281 4.39 Detroit Tigers 1934 Cincinnati Reds 4.22 .277 NL
AL .275 4.37 St. Louis (A) Browns 1935 Chicago (N) Cubs 4.57 .280 NL
AL .284 4.62 Washington Senators 1936 Pittsburgh Pirates 5.00 .287 NL
AL .280 4.54 Washington Senators 1937 Chicago (N) Cubs 4.66 .274 NL
AL .278 4.67 Cleveland Indians 1938 Brooklyn Dodgers 4.51 .270 NL
AL .277 4.64 Washington Senators 1939 Cincinnati Reds 4.56 .275 NL
AL .274 4.61 Philadelphia (A) Athletic 1940 Brooklyn Dodgers 4.09 .262 NL
AL .263 4.22 Chicago (A) White Sox 1941 Pittsburgh Pirates 4.16 .262 NL
AL .251 3.71 Washington Senators 1942 St. Louis (N) Cardinals 3.88 .255 NL
AL .255 3.84 New York (A) Yankees 1943 Boston (N) Braves 3.64 .253 NL
AL .261 3.95 New York (A) Yankees 1944 St. Louis (N) Cardinals 3.84 .261 NL
AL .259 4.05 New York (A) Yankees 1945 Boston (N) Braves 3.94 .261 NL
AL .257 4.04 New York (A) Yankees 1946 Chicago (N) Cubs 3.91 .255 NL
AL .266 4.47 Detroit Tigers 1947 New York (N) Giants 4.14 .257 NL
AL .263 4.25 Detroit Tigers 1948 Philadelphia (N) Phillies 4.49 .264 NL
AL .260 4.39 New York (A) Yankees 1949 Pittsburgh Pirates 4.66 .264 NL