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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Cheslav Neustruev | 1.102 | 1964-1970 | |
| 2 | Armando Ruíz | 1.081 | 1950-1961 | |
| 3 | Arturo Molina | 1.045 | 1939-1951 | |
| 3 | Mark Poste# | 1.045 | 1983-1990 | |
| 5 | Bob Gardner | 1.038 | 1982-1987 | |
| 6 | Killian Rolston | 1.034 | 1969-1979 | |
| 7 | Felipe Sandoval# | 1.023 | 1975-1979 | |
| 8 | Fabio Veeneman | 1.020 | 1942-1946 | |
| 9 | Mauro Martínez# | 1.012 | 1982-1990 | |
| 10 | Jesús González# | 1.005 | 1982-1990 | |
| 11 | Brian Bowness# | 0.998 | 1976-1990 | |
| 12 | Hideyoshi Okabe | 0.994 | 1929-1940 | |
| 13 | Orlando Valverde | 0.990 | 1945-1957 | |
| 14 | Fedele Sapia | 0.961 | 1949-1955 |
