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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Roger Guillet# | .4547 | 1954-1959 | |
| 2 | Huibert van Duren# | .4470 | 1954-1959 | |
| 3 | Kazu Nakanishi# | .4387 | 1952-1959 | |
| 4 | Jorge Lopez# | .4329 | 1953-1958 | |
| 5 | Joe Brewer# | .4201 | 1952-1959 | |
| 6 | Trevor Walker# | .4051 | 1956-1959 | |
| 7 | Byron Ward | .4041 | 1952-1956 | |
| 8 | Gökberk Erol# | .4029 | 1957-1959 | |
| 9 | Donato Marciano# | .3868 | 1952-1959 | |
| 10 | Josh Parker | .3863 | 1952-1954 | |
| 11 | Li-xue Da# | .3831 | 1953-1959 | |
| 12 | Jon Olson# | .3796 | 1952-1959 | |
| 13 | Kei Kamiya# | .3757 | 1954-1959 | |
| 14 | Josh Lewis | .3695 | 1952-1954 | |
| 15 | Harry Cook# | .3604 | 1952-1959 | |
| 16 | Girolamo Iuliano# | .3496 | 1952-1959 |
