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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Aftab Mengal# | 1.8955 | 2020-2024 | |
| 2 | Tamotsu Yamashita# | 1.0077 | 2025-2026 | |
| 3 | Katsumoto Mori# | .9448 | 2025-2026 | |
| 4 | Hoang Kieu# | .8185 | 2022-2023 | |
| 5 | Fu-po Tseng# | .7932 | 2025-2026 | |
| 6 | Morihiro Yamasaki# | .7221 | 2025-2026 | |
| 7 | Yasujiro Iitsuka# | .6372 | 2025-2026 | |
| 8 | Teruo Suzuki# | .5847 | 2025-2026 |
