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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Aftab Mengal# | 3015.2 | 2020-2025 | |
| 2 | Tamotsu Yamashita# | 2537.1 | 2023-2026 | |
| 3 | Tetsuzan Araki# | 2410.1 | 2022-2025 | |
| 4 | Kimi Kokura# | 2148.1 | 2022-2025 | |
| 5 | Morihiro Yamasaki# | 2145.1 | 2024-2027 |
