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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Victor Diaz# | .4890 | 1981 | |
| 2 | Thomas Wallace# | .4852 | 1981 | |
| 3 | John Milner# | .4188 | 1968 | |
| 4 | Ricky de la Cruz# | .3988 | 1981 | |
| 4 | Frank Meraz# | .3988 | 1981 | |
| 6 | Gary Gill# | .3415 | 1981 | |
| 7 | John Halasz# | .2865 | 1981 | |
| 8 | Eric Jones# | .2775 | 1981 | |
| 9 | Kevin Stanley# | .2706 | 1981 |
