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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Edwin Cooper# | .4028 | 2023 | |
| 2 | Alfonso González# | .4009 | 2023 | |
| 3 | Duane Koch# | .3687 | 2023 | |
| 4 | George Tyler# | .3659 | 2023 | |
| 5 | Emílio Soto# | .3601 | 2023 | |
| 6 | José Torrez# | .3585 | 2023 |
