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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Diego Rodríguez | .4163 | 1940-1948 | |
| 2 | Brad Spencer | .4052 | 1970-1980 | |
| 3 | Lorenzo Ruíz | .3728 | 1957-1967 | |
| 4 | Fraser Blevins | .3667 | 1974-1984 | |
| 5 | Ángel Camacho | .3555 | 1975-1981 |
