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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Aftab Mengal# | .6098 | 2020-2025 | |
| 2 | Katsumoto Mori# | .4231 | 2025-2026 | |
| 3 | Tamotsu Yamashita# | .4035 | 2023-2026 | |
| 4 | Hoang Kieu# | .3810 | 2022-2024 | |
| 5 | Fu-po Tseng# | .3542 | 2025-2026 | |
| 6 | Yasujiro Iitsuka# | .3393 | 2025-2026 | |
| 7 | Morihiro Yamasaki# | .3103 | 2024-2027 | |
| 8 | Teruo Suzuki# | .2292 | 2025-2026 |
