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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Emílio García | 1.107 | 1923-1928 | |
| 2 | Kevin Hansen | 1.058 | 1946-1949 | |
| 3 | Jorge Marín# | 1.056 | 1979-1985 | |
| 4 | John King# | 1.043 | 1983-1991 | |
| 5 | Joaquín Arteaga | 1.030 | 1940-1942 | |
| 6 | Juan García | 1.027 | 1976-1989 | |
| 7 | Ira Tindall# | 1.021 | 1977-1987 | |
| 8 | Conner Roberts | 1.006 | 1975-1979 | |
| 9 | Gero Hiemer | 1.002 | 1928-1932 | |
| 10 | Zach Rice | 0.988 | 1977-1988 |
