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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dahab Kanda | 2027-2027 | 4 | 7 | .364 | 2.95 | 19 | 19 | 0 | 0 | 0 | 109.2 | 98 | 36 | 4 | 31 | 86 |
| Manabu Kato | 2022-2023 | 4 | 8 | .333 | 3.91 | 56 | 0 | 0 | 0 | 10 | 66.2 | 64 | 29 | 6 | 30 | 70 |
| Kenny Kawaguchi | 2025-2027 | 9 | 7 | .562 | 1.29 | 88 | 0 | 0 | 0 | 6 | 97.1 | 78 | 14 | 2 | 51 | 145 |
| Nuno Kechlmaier | 2025-2025 | 2 | 0 | 1.000 | 2.13 | 9 | 0 | 0 | 0 | 0 | 12.2 | 10 | 3 | 0 | 3 | 11 |
| Kenny Keiper | 2027-2027 | 0 | 3 | .000 | 3.26 | 21 | 0 | 0 | 0 | 0 | 30.1 | 27 | 11 | 0 | 11 | 26 |
| Victor Kent | 2027-2027 | 0 | 0 | .000 | 2.51 | 5 | 2 | 0 | 0 | 2 | 14.1 | 9 | 4 | 1 | 6 | 13 |
| Chae-seong Kim | 2021-2022 | 18 | 8 | .692 | 2.34 | 33 | 33 | 7 | 2 | 0 | 242.1 | 190 | 63 | 5 | 75 | 256 |
| Dae-il Kim | 2023-2026 | 1 | 0 | 1.000 | 5.54 | 7 | 0 | 0 | 0 | 0 | 13.0 | 11 | 8 | 1 | 9 | 12 |
| Song-saeng Kim | 2021-2024 | 19 | 8 | .704 | 2.33 | 41 | 32 | 3 | 2 | 1 | 247.2 | 204 | 64 | 7 | 82 | 244 |
| Jon King | 2028-2028 | 4 | 7 | .364 | 4.34 | 14 | 14 | 0 | 0 | 0 | 83.0 | 87 | 40 | 3 | 31 | 59 |
| Terry King | 2022-2022 | 4 | 1 | .800 | 2.14 | 6 | 6 | 0 | 0 | 0 | 42.0 | 27 | 10 | 0 | 7 | 34 |
| Ids Knegt | 2028-2028 | 3 | 7 | .300 | 4.21 | 14 | 14 | 0 | 0 | 0 | 87.2 | 97 | 41 | 2 | 33 | 45 |
| Naozane Kobayashi | 2028-2028 | 1 | 2 | .333 | 2.81 | 11 | 2 | 0 | 0 | 1 | 25.2 | 18 | 8 | 2 | 6 | 16 |
| Kozue Koga | 2024-2024 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.0 | 2 | 0 | 0 | 1 | 1 |
| Eddie Kop | 2020-2022 | 8 | 18 | .308 | 3.09 | 40 | 40 | 5 | 1 | 0 | 273.2 | 231 | 94 | 13 | 80 | 266 |
| Riemer Kos | 2027-2027 | 0 | 0 | .000 | 0.50 | 12 | 0 | 0 | 0 | 2 | 18.0 | 15 | 1 | 0 | 5 | 19 |
| Brian Krick | 2026-2026 | 3 | 6 | .333 | 3.99 | 44 | 0 | 0 | 0 | 23 | 49.2 | 53 | 22 | 2 | 24 | 65 |
| Shi-xian Kuai | 2027-2028 | 6 | 6 | .500 | 3.31 | 26 | 18 | 0 | 0 | 0 | 114.1 | 122 | 42 | 2 | 42 | 97 |
| Yoshida Kudo | 2020-2020 | 1 | 3 | .250 | 3.34 | 21 | 2 | 1 | 0 | 0 | 29.2 | 34 | 11 | 2 | 14 | 33 |
| George Kuhn | 2023-2026 | 3 | 2 | .600 | 3.19 | 11 | 6 | 0 | 0 | 1 | 48.0 | 38 | 17 | 2 | 22 | 44 |
| Ryunosuke Kurota | 2028-2028 | 5 | 7 | .417 | 3.28 | 16 | 16 | 0 | 0 | 0 | 115.1 | 108 | 42 | 3 | 43 | 90 |
| Dale Kurth | 2027-2027 | 0 | 1 | .000 | 1.08 | 7 | 0 | 0 | 0 | 4 | 8.1 | 8 | 1 | 1 | 2 | 14 |
| Jin Kwon | 2027-2028 | 7 | 11 | .389 | 3.31 | 84 | 0 | 0 | 0 | 43 | 89.2 | 74 | 33 | 7 | 35 | 101 |
| Trevor Kyrle | 2028-2028 | 0 | 0 | .000 | 7.42 | 7 | 0 | 0 | 0 | 0 | 13.1 | 19 | 11 | 2 | 9 | 16 |
