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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | José López# | .479 | 2029-2033 | |
| 2 | Tetsu Araki | .439 | 2017-2025 | |
| 3 | Shiro Yoshida | .425 | 2015-2025 | |
| 4 | Noriyuki Rin | .411 | 2015-2027 | |
| 5 | Raúl Martínez | .403 | 2014-2020 | |
| 6 | Lewis Buckley | .332 | 2019-2026 |
