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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Bill Melton# | .4909 | 1966 | |
| 2 | Mike LaValliere# | .3905 | 1981 | |
| 3 | Daniel Wieser# | .3679 | 1981 | |
| 4 | William Butler# | .3410 | 1981 | |
| 5 | Dean Kornacker# | .3272 | 1981 |
