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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Miguel Hernández | 1.092 | 1937-1942 | |
| 2 | José Rivera | 1.071 | 1915-1919 | |
| 3 | Ronnie Moore | 1.065 | 1911-1916 | |
| 4 | Arvid van Leeuwen | 1.048 | 1936-1943 | |
| 5 | Clay Anderson | 1.044 | 1956-1961 | |
| 6 | Anthony Williams | 1.017 | 1912-1918 | |
| 7 | Shigeaki Mochizuki# | 1.014 | 1986-1989 | |
| 8 | Jeff Davis | 1.008 | 1912-1916 |
