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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Cristián Betancourt | 1.133 | 1966-1971 | |
| 2 | Cristián García | 1.069 | 1925-1929 | |
| 3 | Gary Hubbard | 1.068 | 1957-1962 | |
| 4 | Jeff Snyder | 1.053 | 1945-1949 | |
| 5 | Francisco Alston# | 1.034 | 1983-1986 | |
| 6 | Danny Warren | 1.032 | 1934-1941 | |
| 6 | Luis Gómez# | 1.032 | 1975-1991 | |
| 8 | Carlos Guthrie | 1.017 | 1913-1917 | |
| 8 | Hunter Dominey | 1.017 | 1976-1987 | |
| 10 | Ian Grooms# | 0.999 | 1977-1980 | |
| 11 | Isaac Love | 0.883 | 1959-1963 | |
| 12 | Felipe Sandoval# | 0.882 | 1987-1991 |
