| 9 World Series championship seasons: 1910, 1911, 1913, 1929, 1930, 1972, 1973, 1974, 1989 |
| Last World Series championship: 1989, 35 seasons ago |
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| Philadelphia As became Kansas City As in 1955 |
| Kansas City As became Oakland As in 1968 |
| Oakland As became As in 2025 |
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| Best finish (by location): |
| Philadelphia As beat Chi Cubs in World Series in 1910 season |
| Philadelphia As beat NY Giants in World Series in 1911 season |
| Philadelphia As beat NY Giants in World Series in 1913 season |
| Philadelphia As beat Chi Cubs in World Series in 1929 season |
| Philadelphia As beat St Louis in World Series in 1930 season |
| Kansas City As finished 73-81 (.474) in American League in 1958 season |
| Oakland beat Cincinnati in World Series in 1972 season |
| Oakland beat NY Mets in World Series in 1973 season |
| Oakland beat Los Angeles in World Series in 1974 season |
| Oakland beat San Francisco in World Series in 1989 season |
| As finished 76-86 (.469) in AL West in 2025 season |
