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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Aftab Mengal# | 1.286 | 2020-2025 | |
| 2 | Tamotsu Yamashita# | .604 | 2023-2026 | |
| 3 | Katsumoto Mori# | .522 | 2025-2026 | |
| 4 | Fu-po Tseng | .439 | 2025-2026 | |
| 5 | Hoang Kieu# | .438 | 2022-2024 | |
| 6 | Morihiro Yamasaki# | .412 | 2024-2027 | |
| 7 | Teruo Suzuki | .356 | 2025-2026 | |
| 8 | Yasujiro Iitsuka | .298 | 2025-2026 |
