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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Salvador Gómez | 1.087 | 1951-1957 | |
| 2 | Conan Mercer | 1.079 | 1913-1921 | |
| 3 | Diego Rodríguez | 1.072 | 1940-1948 | |
| 3 | Jim Crowe | 1.072 | 1925-1934 | |
| 5 | Ángel Camacho | 1.043 | 1975-1981 | |
| 6 | Robert Jones | 1.041 | 1982-1986 | |
| 7 | Fraser Blevins | 1.018 | 1974-1984 | |
| 8 | Brad Spencer | 1.012 | 1970-1980 | |
| 9 | Héctor Palomarez# | 0.999 | 1984-1987 | |
| 10 | Lorenzo Ruíz | 0.960 | 1957-1967 |
