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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 | Danny Dunlap# | .814 | 2031-2034 | |
| 3 | Kol-in-sen Koo# | .675 | 2032-2034 | |
| 4 | Tamotsu Yamashita | .604 | 2023-2026 | |
| 5 | Dustin Adkinson# | .590 | 2032-2034 | |
| 6 | Kazuhiko Kai# | .564 | 2032-2034 | |
| 7 | Toshimitsu Epps# | .550 | 2032-2034 | |
| 8 | Katsumoto Mori | .522 | 2025-2026 | |
| 9 | Hayaki Shinozaki# | .515 | 2032-2034 | |
| 10 | Tetsuya Toyoda# | .514 | 2032-2034 | |
| 11 | Fu-po Tseng | .439 | 2025-2026 | |
| 12 | Hoang Kieu# | .438 | 2022-2024 | |
| 13 | Morihiro Yamasaki# | .412 | 2024-2027 | |
| 14 | Teruo Suzuki | .356 | 2025-2026 | |
| 15 | Yasujiro Iitsuka | .298 | 2025-2026 | |
| 16 | Min-u Kym# | .293 | 2032-2034 | |
| 17 | Minehiro Nishida# | .205 | 2030-2034 |
