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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Manuel Pérez | 1.119 | 1979-1987 | |
| 2 | Millard Whitaker# | 1.089 | 1977-1990 | |
| 3 | Emílio Córdova# | 1.086 | 1979-1982 | |
| 4 | Manny Márquez | 1.061 | 1957-1960 | |
| 5 | Jun-ho Park# | 1.056 | 1986-1988 | |
| 6 | Emílio Román | 1.003 | 1945-1949 | |
| 7 | Brad Ford# | 0.780 | 1981-1986 |
