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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Christian Parent | 1.123 | 1966-1969 | |
| 2 | José Montero | 1.104 | 1958-1960 | |
| 3 | Robert Jones | 1.050 | 1977-1981 | |
| 4 | José Reyes | 1.049 | 1941-1946 | |
| 5 | Manny Garza | 1.021 | 1911-1916 | |
| 6 | Juan Escobar | 0.966 | 1978-1983 |
