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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tetsuzan Kaneko | 2021-2021 | 11 | 11 | .500 | 3.31 | 25 | 25 | 4 | 0 | 0 | 187.1 | 157 | 69 | 14 | 47 | 130 |
| Makoto Kato | 2018-2019 | 19 | 16 | .543 | 3.56 | 42 | 42 | 6 | 2 | 0 | 293.0 | 269 | 116 | 29 | 85 | 260 |
| John Keller | 2018-2021 | 10 | 8 | .556 | 3.96 | 135 | 14 | 0 | 0 | 5 | 215.2 | 200 | 95 | 18 | 94 | 186 |
| Bill Kelly | 2015-2019 | 8 | 10 | .444 | 4.68 | 53 | 25 | 0 | 0 | 2 | 177.0 | 194 | 92 | 16 | 64 | 119 |
| Jack King | 2021-2021 | 1 | 1 | .500 | 8.20 | 9 | 2 | 0 | 0 | 0 | 26.1 | 29 | 24 | 7 | 14 | 34 |
| Rusty King | 2016-2017 | 6 | 6 | .500 | 3.58 | 51 | 12 | 0 | 0 | 17 | 118.0 | 108 | 47 | 8 | 31 | 94 |
| Erwin Koevoet | 2015-2017 | 3 | 3 | .500 | 2.59 | 69 | 0 | 0 | 0 | 0 | 76.1 | 57 | 22 | 4 | 26 | 62 |
| Kenshin Koike | 2018-2021 | 17 | 15 | .531 | 3.29 | 73 | 38 | 2 | 0 | 2 | 279.1 | 280 | 102 | 23 | 92 | 245 |
| Terao Kondo | 2020-2020 | 0 | 5 | .000 | 11.51 | 7 | 4 | 0 | 0 | 0 | 20.1 | 36 | 26 | 2 | 21 | 4 |
