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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Preston Cash# | .8252 | 1981 | |
| 2 | Mark Bonner# | .4574 | 1981 | |
| 3 | Dion James# | .4322 | 1981 | |
| 4 | Jose Canseco# | .4167 | 1981 | |
| 5 | Barry Siebert# | .3925 | 1981 | |
| 6 | Ricky Velasquez# | .3829 | 1981 | |
| 7 | Dave Leeper# | .3697 | 1981 | |
| 8 | Dave Coss# | .3500 | 1981 |
