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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | José Hernández# | 1.130 | 1982-1991 | |
| 2 | Dale Mooney# | 1.120 | 1982-1991 | |
| 3 | Darrel Edmonds | 1.094 | 1975-1984 | |
| 4 | William Veeck | 1.045 | 1923-1930 | |
| 5 | Aberto Cambria | 1.042 | 1915-1925 | |
| 6 | Anastasio Martínez | 1.032 | 1952-1963 | |
| 7 | Colin Wilkins | 1.012 | 1963-1970 | |
| 8 | Will Jewell | 1.007 | 1952-1959 | |
| 9 | Jason Miner | 0.999 | 1962-1976 | |
| 10 | José Peña | 0.993 | 1937-1946 | |
| 11 | Julián Salazar | 0.991 | 1933-1942 | |
| 12 | Rob Rice | 0.983 | 1931-1936 | |
| 13 | Tom Booker | 0.969 | 1969-1983 | |
| 14 | Brady Allen | 0.962 | 1944-1949 | |
| 14 | Carlos González | 0.962 | 1969-1980 | |
| 16 | Claudio Moreno | 0.948 | 1951-1964 | |
| 17 | Luis Hernández | 0.947 | 1975-1984 | |
| 18 | Tim Kennedy | 0.932 | 1977-1990 |
