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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Date | Player | Win Seasons | |
|---|---|---|---|
| 2014 | Sadao Kawasawa | 21-6, 3.42 ERA, 207.2 IP, 49 BB and 193 K | |
| 2014 | Ryutaro Jouda | 21-7, 4.20 ERA, 205.2 IP, 62 BB and 115 K | |
| 2023 | Masato Kato | 20-2, 2.66 ERA, 186.0 IP, 52 BB and 230 K | |
| 2038 | Nobuyoshi Endo | 20-6, 3.03 ERA, 201.2 IP, 50 BB and 189 K |
