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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manabu Kato | 0-2025 | 4 | 8 | .333 | 3.91 | 56 | 0 | 0 | 0 | 10 | 66.2 | 64 | 29 | 6 | 30 | 70 |
| Kenny Kawaguchi | 0-4 | 5 | 1 | .833 | 0.76 | 32 | 0 | 0 | 0 | 0 | 35.2 | 31 | 3 | 1 | 10 | 46 |
| Nuno Kechlmaier | 0-4 | 2 | 0 | 1.000 | 2.13 | 9 | 0 | 0 | 0 | 0 | 12.2 | 10 | 3 | 0 | 3 | 11 |
| Chae-seong Kim | 3-2022 | 18 | 8 | .692 | 2.34 | 33 | 33 | 7 | 2 | 0 | 242.1 | 190 | 63 | 5 | 75 | 256 |
| Dae-il Kim | 0-2025 | 1 | 0 | 1.000 | 5.40 | 6 | 0 | 0 | 0 | 0 | 10.0 | 8 | 6 | 1 | 7 | 10 |
| Song-saeng Kim | 5-2025 | 19 | 8 | .704 | 2.33 | 41 | 32 | 3 | 2 | 1 | 247.2 | 204 | 64 | 7 | 82 | 244 |
| Terry King | 0-2021 | 4 | 1 | .800 | 2.14 | 6 | 6 | 0 | 0 | 0 | 42.0 | 27 | 10 | 0 | 7 | 34 |
| Kozue Koga | 0-2020 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.0 | 2 | 0 | 0 | 1 | 1 |
| Eddie Kop | 1-2021 | 8 | 18 | .308 | 3.09 | 40 | 40 | 5 | 1 | 0 | 273.2 | 231 | 94 | 13 | 80 | 266 |
| Yoshida Kudo | 0-2025 | 1 | 3 | .250 | 3.34 | 21 | 2 | 1 | 0 | 0 | 29.2 | 34 | 11 | 2 | 14 | 33 |
| George Kuhn | 0-4 | 3 | 1 | .750 | 2.30 | 8 | 5 | 0 | 0 | 1 | 43.0 | 28 | 11 | 1 | 18 | 35 |
