American League
Liigamestarit 1900-1968

| Vuosi | Voittaja | Saldo | GA | Toinen | Ref |
| --- | --- | --- | --- | --- | --- |
| 1900 | Chicago White Stockings | 82-53 | 4 | Milwaukee Brewers |  |
| 1901 | Chicago White Stockings | 83-53 | 4 | Boston Americans |  |
| 1902 | Philadelphia Athletics | 83-53 | 5 | St. Louis Browns |  |
| 1903 | Boston Americans* | 91-47 | 14.5 | Philadelphia Athletics |  |
| 1904 | Boston Americans | 95-59 | 1.5 | New York Highlanders |  |
| 1905 | Philadelphia Athletics | 92-56 | 2 | Chicago White Sox |  |
| 1906 | Chicago White Sox* | 93-58 | 3 | New York Highlanders |  |
| 1907 | Detroit Tigers | 92-58 | 1.5 | Philadelphia Athletics |  |
| 1908 | Detroit Tigers | 90-63 | 0.5 | Cleveland Naps |  |
| 1909 | Detroit Tigers | 98-54 | 3.5 | Philadelphia Athletics |  |
| 1910 | Philadelphia Athletics* | 102-48 | 14.5 | New York Highlanders |  |
| 1911 | Philadelphia Athletics* | 101-50 | 13.5 | Detroit Tigers |  |
| 1912 | Boston Red Sox* | 105–47 | 14 | Washington Senators |  |
| 1913 | Philadelphia Athletics* | 96-57 | 6.5 | Washington Senators |  |
| 1914 | Philadelphia Athletics | 99-53 | 8.5 | Boston Red Sox |  |
| 1915 | Boston Red Sox* | 101-50 | 2.5 | Detroit Tigers |  |
| 1916 | Boston Red Sox* | 91-63 | 2 | Chicago White Sox |  |
| 1917 | Chicago White Sox* | 100–54 | 9 | Boston Red Sox |  |
| 1918 | Boston Red Sox* | 75-51 | 2.5 | Cleveland Indians |  |
| 1919 | Chicago White Sox | 88-52 | 3.5 | Cleveland Indians |  |
| 1920 | Cleveland Indians* | 98-56 | 2 | Chicago White Sox |  |
| 1921 | New York Yankees | 98-55 | 4.5 | Cleveland Indians |  |
| 1922 | New York Yankees | 94-60 | 1 | St. Louis Browns |  |
| 1923 | New York Yankees* | 98-54 | 16 | Detroit Tigers |  |
| 1924 | Washington Senators* | 92-62 | 2 | New York Yankees |  |
| 1925 | Washington Senators | 96-55 | 8.5 | Philadelphia Athletics |  |
| 1926 | New York Yankees | 91-63 | 3 | Cleveland Indians |  |
| 1927 | New York Yankees* | 110–44 | 19 | Philadelphia Athletics |  |
| 1928 | New York Yankees* | 101-53 | 2.5 | Philadelphia Athletics |  |
| 1929 | Philadelphia Athletics* | 104-46 | 18 | New York Yankees |  |
| 1930 | Philadelphia Athletics* | 102-52 | 8 | Washington Senators |  |
| 1931 | Philadelphia Athletics | 107-45 | 13.5 | New York Yankees |  |
| 1932 | New York Yankees* | 107-47 | 13 | Philadelphia Athletics |  |
| 1933 | Washington Senators | 99-53 | 7 | New York Yankees |  |
| 1934 | Detroit Tigers | 101-53 | 7 | New York Yankees |  |
| 1935 | Detroit Tigers* | 93-58 | 3 | New York Yankees |  |
| 1936 | New York Yankees* | 102-51 | 19.5 | Detroit Tigers |  |
| 1937 | New York Yankees* | 102-52 | 13 | Detroit Tigers |  |
| 1938 | New York Yankees* | 99-53 | 9.5 | Boston Red Sox |  |
| 1939 | New York Yankees* | 106–45 | 17 | Boston Red Sox |  |
| 1940 | Detroit Tigers | 90-53} | 1 | Cleveland Indians |  |
| 1941 | New York Yankees* | 101-53 | 17 | Boston Red Sox |  |
| 1942 | New York Yankees | 103-51 | 9 | Boston Red Sox |  |
| 1943 | New York Yankees* | 98-49 | 13.5 | Washington Senators |  |
| 1944 | St. Louis Browns | 89-49 | 1 | Detroit Tigers |  |
| 1945 | Detroit Tigers* | 88-65 | 1.5 | Washington Senators |  |
| 1946 | Boston Red Sox | 104-50 | 12 | Detroit Tigers |  |
| 1947 | New York Yankees* | 97-57 | 12 | Detroit Tigers |  |
| 1948 | Cleveland Indians* | 97-58 | 1 | Boston Red Sox |  |
| 1949 | New York Yankees* | 97-57 | 1 | Boston Red Sox |  |
| 1950 | New York Yankees* | 98-56 | 3 | Detroit Tigers |  |
| 1951 | New York Yankees* | 98-56 | 5 | Cleveland Indians |  |
| 1952 | New York Yankees* | 95-59 | 2 | Cleveland Indians |  |
| 1953 | New York Yankees* | 99-52 | 8.5 | Cleveland Indians |  |
| 1954 | Cleveland Indians | 111–43 | 8 | New York Yankees |  |
| 1955 | New York Yankees | 96-58 | 3 | Cleveland Indians |  |
| 1956 | New York Yankees* | 97-57 | 9 | Cleveland Indians |  |
| 1957 | New York Yankees | 98-56 | 8 | Chicago White Sox |  |
| 1958 | New York Yankees* | 92-62 | 10 | Chicago White Sox |  |
| 1959 | Chicago White Sox | 94-60 | 5 | Cleveland Indians |  |
| 1960 | New York Yankees | 97-57 | 8 | Baltimore Orioles |  |
| 1961 | New York Yankees* | 109–53 | 8 | Detroit Tigers |  |
| 1962 | New York Yankees* | 96-62 | 5 | Minnesota Twins |  |
| 1963 | New York Yankees | 104-57 | 10.5 | Chicago White Sox |  |
| 1964 | New York Yankees | 99-63 | 1 | Chicago White Sox |  |
| 1965 | Minnesota Twins | 102-60 | 7 | Chicago White Sox |  |
| 1966 | Baltimore Orioles* | 97-63 | 9 | Minnesota Twins |  |
| 1967 | Boston Red Sox | 92-70 | 1 | Detroit Tigers |  |
| 1968 | Detroit Tigers* | 103-59 | 12 | Baltimore Orioles |  |
| --- | --- |
*: Voitti World Seriesin
Vuodesta 1969 lähtien liigamestaruus on ratkaistu loppuottelusarjalla.