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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Steven Carney# | .6402 | 1981 | |
| 2 | Steven Carney# | .5301 | 1984 | |
| 3 | Steven Carney# | .4930 | 1982 | |
| 4 | Sixto Benvijes# | .4928 | 1983 | |
| 5 | Mike Wiedle# | .4831 | 1982 | |
| 6 | Steven Carney# | .4679 | 1983 | |
| 7 | Sixto Benvijes# | .4636 | 1982 | |
| 8 | Mike Wiedle# | .4394 | 1984 | |
| 9 | Allen Erwin# | .4120 | 1985 | |
| 10 | Shawn Bernard# | .4081 | 1981 | |
| 11 | Shawn Bernard# | .4079 | 1983 | |
| 12 | Steven Carney# | .4071 | 1985 | |
| 13 | Shawn Bernard# | .4052 | 1985 | |
| 14 | Shawn Bernard# | .3947 | 1984 | |
| 15 | Shawn Bernard# | .3880 | 1982 | |
| 16 | Armando Rodríguez# | .3815 | 1981 | |
| 17 | Keith Graham# | .3767 | 1982 | |
| 18 | Pat Howard# | .3647 | 1981 | |
| 19 | Sergio Gutiérrez# | .3515 | 1982 |
