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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Huai-yu Kan | 0-2023 | 4 | 5 | .444 | 4.51 | 21 | 20 | 0 | 0 | 0 | 109.2 | 107 | 55 | 12 | 48 | 58 |
| Tetsuzan Kaneko | 4-2022 | 22 | 18 | .550 | 3.25 | 61 | 61 | 4 | 0 | 0 | 392.2 | 377 | 142 | 40 | 92 | 264 |
| Makoto Kato | 1-2026 | 17 | 12 | .586 | 3.31 | 44 | 44 | 7 | 1 | 0 | 318.0 | 270 | 117 | 41 | 86 | 216 |
| John Kaufman | 3-2017 | 14 | 12 | .538 | 4.09 | 72 | 25 | 1 | 0 | 7 | 200.0 | 176 | 91 | 11 | 108 | 144 |
| Wing-tat Ke | 0-2022 | 1 | 1 | .500 | 9.64 | 7 | 5 | 0 | 0 | 0 | 28.0 | 45 | 30 | 5 | 10 | 13 |
| Joe Kehoe | 4-2025 | 23 | 22 | .511 | 4.51 | 122 | 54 | 0 | 0 | 2 | 381.1 | 361 | 191 | 43 | 145 | 323 |
| John Keller | 0-2023 | 4 | 6 | .400 | 5.09 | 61 | 3 | 0 | 0 | 2 | 93.2 | 109 | 53 | 13 | 48 | 75 |
| Bill Kelly | -1-2023 | 7 | 7 | .500 | 5.95 | 29 | 20 | 0 | 0 | 0 | 110.1 | 130 | 73 | 17 | 70 | 64 |
| Ron Kennedy | 0-2018 | 8 | 3 | .727 | 3.56 | 83 | 0 | 0 | 0 | 3 | 98.2 | 95 | 39 | 16 | 34 | 87 |
| Millard Kessler | 0-2021 | 0 | 0 | .000 | 1.64 | 5 | 0 | 0 | 0 | 0 | 11.0 | 9 | 2 | 0 | 2 | 8 |
| Hirokichi Kichida | 2-2024 | 3 | 4 | .429 | 3.18 | 20 | 20 | 0 | 0 | 0 | 107.2 | 96 | 38 | 5 | 41 | 81 |
| Chang-soo Kim | 0-2023 | 0 | 0 | .000 | 1.35 | 9 | 0 | 0 | 0 | 0 | 6.2 | 2 | 1 | 0 | 2 | 9 |
| Joong-geun Kim | 1-2023 | 7 | 7 | .500 | 2.86 | 56 | 0 | 0 | 0 | 9 | 78.2 | 68 | 25 | 6 | 29 | 64 |
| Jung-hoon Kim | 4-2020 | 22 | 14 | .611 | 3.31 | 61 | 50 | 0 | 0 | 1 | 310.0 | 260 | 114 | 46 | 71 | 254 |
| Joe King | 0-2015 | 14 | 17 | .452 | 6.16 | 43 | 43 | 2 | 0 | 0 | 219.0 | 251 | 150 | 34 | 98 | 184 |
| Rusty King | 0-2021 | 4 | 1 | .800 | 3.21 | 52 | 0 | 0 | 0 | 27 | 56.0 | 47 | 20 | 9 | 16 | 63 |
| Steve King | 2-2023 | 12 | 8 | .600 | 4.27 | 63 | 25 | 0 | 0 | 1 | 213.0 | 211 | 101 | 28 | 82 | 164 |
| Gene Kirkland | 2-2020 | 8 | 5 | .615 | 2.17 | 120 | 0 | 0 | 0 | 12 | 132.2 | 92 | 32 | 10 | 38 | 144 |
| Erwin Koevoet | 0-2017 | 5 | 1 | .833 | 3.72 | 31 | 0 | 0 | 0 | 5 | 36.1 | 30 | 15 | 4 | 20 | 30 |
| Kenshin Koike | 0-2022 | 6 | 20 | .231 | 5.05 | 37 | 35 | 0 | 0 | 0 | 173.0 | 187 | 97 | 30 | 64 | 133 |
| Eddie Kop | 10-2026 | 38 | 25 | .603 | 2.92 | 82 | 82 | 9 | 6 | 0 | 557.2 | 468 | 181 | 37 | 152 | 503 |
| Stephen Kramer | 0-2015 | 0 | 0 | .000 | 9.00 | 2 | 0 | 0 | 0 | 0 | 2.0 | 3 | 2 | 1 | 2 | 2 |
| Jeff Krause | 1-2026 | 15 | 7 | .682 | 3.33 | 43 | 27 | 5 | 1 | 2 | 210.2 | 199 | 78 | 21 | 73 | 120 |
| Deron Kuhn | 0-2023 | 1 | 1 | .500 | 4.38 | 23 | 1 | 0 | 0 | 3 | 51.1 | 60 | 25 | 10 | 21 | 22 |
