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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Terumoto Nii | .5737 | 2021-2038 | |
| 2 | Yosuke Miyazaki# | .4966 | 2031-2042 | |
| 3 | Germán Limón# | .4947 | 2033-2042 | |
| 4 | Roger Garrett | .4693 | 2028-2036 | |
| 5 | Jiro Kawaguchi | .4241 | 2030-2038 |
