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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Heintz Klosel | 1.042 | 1926-1929 | |
| 2 | Jimmy McHaffy# | 1.036 | 1982-1985 | |
| 3 | Leonard Werner# | 1.015 | 1976-1980 | |
| 4 | Carl Merrills | 1.012 | 1941-1954 | |
| 5 | Maaik Visser# | 1.011 | 1982-1989 |
