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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jian Wang | 1.061 | 1945-1947 | |
| 2 | Mike Stafford | 1.045 | 1962-1966 | |
| 3 | Feng Tann# | 1.036 | 1984-1991 | |
| 4 | Augusto Rodríguez | 1.033 | 1957-1961 | |
| 5 | Rubén González | 1.024 | 1958-1962 | |
| 6 | Barry Cook | 1.023 | 1975-1987 |
