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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 | 2028-2028 | 3 | 4 | .429 | 2.75 | 15 | 15 | 0 | 0 | 0 | 88.1 | 79 | 27 | 3 | 21 | 106 |
| Manabu Kato | 2021-2021 | 0 | 0 | .000 | 0.00 | 3 | 0 | 0 | 0 | 0 | 3.2 | 2 | 0 | 0 | 5 | 4 |
| Nuno Kechlmaier | 2026-2026 | 1 | 0 | 1.000 | 0.71 | 13 | 1 | 0 | 0 | 2 | 12.2 | 8 | 1 | 0 | 4 | 6 |
| Gerald Keller | 2026-2026 | 5 | 2 | .714 | 2.25 | 12 | 12 | 0 | 0 | 0 | 60.0 | 56 | 15 | 2 | 20 | 60 |
| Jeren Kendall | 2025-2025 | 5 | 4 | .556 | 2.21 | 11 | 11 | 1 | 0 | 0 | 69.1 | 70 | 17 | 1 | 23 | 61 |
| Greg Kennamer | 2028-2028 | 1 | 1 | .500 | 1.96 | 18 | 0 | 0 | 0 | 12 | 18.1 | 16 | 4 | 1 | 6 | 19 |
| Rick Kennedy | 2024-2024 | 11 | 3 | .786 | 1.36 | 34 | 1 | 0 | 0 | 1 | 73.0 | 47 | 11 | 0 | 21 | 93 |
| Ma Hon Keung | 2025-2026 | 7 | 14 | .333 | 3.52 | 26 | 26 | 1 | 0 | 0 | 176.1 | 184 | 69 | 4 | 43 | 139 |
| Mike Keys | 2026-2026 | 7 | 2 | .778 | 1.82 | 36 | 0 | 0 | 0 | 7 | 49.1 | 38 | 10 | 1 | 22 | 61 |
| Ki-heung Kim | 2028-2028 | 2 | 1 | .667 | 3.58 | 17 | 0 | 0 | 0 | 0 | 27.2 | 30 | 11 | 1 | 22 | 23 |
| Min-chin Kim | 2028-2028 | 7 | 3 | .700 | 2.34 | 21 | 12 | 0 | 0 | 1 | 73.0 | 49 | 19 | 4 | 33 | 87 |
| Seung-yeop Kim | 2022-2022 | 3 | 4 | .429 | 2.43 | 9 | 9 | 0 | 0 | 0 | 59.1 | 39 | 16 | 1 | 16 | 48 |
| Song-saeng Kim | 2025-2026 | 3 | 1 | .750 | 2.31 | 19 | 0 | 0 | 0 | 0 | 46.2 | 25 | 12 | 1 | 14 | 58 |
| Terry King | 2021-2021 | 0 | 1 | .000 | 3.14 | 7 | 0 | 0 | 0 | 1 | 14.1 | 13 | 5 | 0 | 5 | 14 |
| Kenny Koehler | 2023-2023 | 7 | 9 | .438 | 3.18 | 22 | 22 | 0 | 0 | 0 | 141.2 | 125 | 50 | 5 | 43 | 147 |
| Masami Kogawa | 2026-2027 | 11 | 19 | .367 | 3.06 | 39 | 39 | 4 | 0 | 0 | 282.2 | 247 | 96 | 17 | 82 | 294 |
| Evan Koopman | 2020-2020 | 0 | 3 | .000 | 4.14 | 13 | 3 | 0 | 0 | 0 | 37.0 | 34 | 17 | 1 | 22 | 21 |
| Riemer Kos | 2026-2026 | 2 | 3 | .400 | 2.59 | 24 | 2 | 0 | 0 | 1 | 55.2 | 38 | 16 | 4 | 22 | 51 |
| Brian Krick | 2027-2027 | 5 | 4 | .556 | 2.72 | 54 | 0 | 0 | 0 | 4 | 46.1 | 31 | 14 | 3 | 19 | 70 |
| Maik Kruidenier | 2020-2020 | 5 | 6 | .455 | 4.03 | 26 | 5 | 1 | 0 | 0 | 67.0 | 80 | 30 | 3 | 32 | 50 |
| Ryunosuke Kurota | 2026-2027 | 11 | 3 | .786 | 2.52 | 17 | 17 | 0 | 0 | 0 | 121.2 | 95 | 34 | 6 | 41 | 121 |
| Jin Kwon | 2026-2026 | 0 | 7 | .000 | 6.07 | 24 | 0 | 0 | 0 | 8 | 26.2 | 24 | 18 | 0 | 25 | 25 |
