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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 | 10-2022 | 25 | 23 | .521 | 2.89 | 66 | 66 | 7 | 2 | 0 | 464.2 | 387 | 149 | 34 | 117 | 311 |
| Makoto Kato | 6-2022 | 23 | 18 | .561 | 3.56 | 50 | 50 | 6 | 2 | 0 | 336.1 | 311 | 133 | 33 | 94 | 306 |
| John Kaufman | 0-2022 | 9 | 11 | .450 | 3.16 | 23 | 23 | 5 | 1 | 0 | 174.0 | 141 | 61 | 9 | 67 | 158 |
| Joe Kehoe | 0-2025 | 2 | 2 | .500 | 4.02 | 7 | 7 | 0 | 0 | 0 | 31.1 | 28 | 14 | 2 | 15 | 14 |
| John Keller | 3-2025 | 18 | 11 | .621 | 3.28 | 222 | 14 | 0 | 0 | 7 | 329.2 | 269 | 120 | 24 | 159 | 293 |
| Bill Kelly | 0-2019 | 10 | 13 | .435 | 5.16 | 101 | 25 | 0 | 0 | 3 | 259.2 | 300 | 149 | 27 | 115 | 183 |
| Hirokichi Kichida | 0-2024 | 0 | 4 | .000 | 7.55 | 10 | 10 | 0 | 0 | 0 | 47.2 | 69 | 40 | 5 | 27 | 26 |
| Han-seung Kim | 0-2023 | 2 | 7 | .222 | 5.47 | 20 | 16 | 0 | 0 | 0 | 77.1 | 90 | 47 | 13 | 31 | 37 |
| Il-young Kim | 0-0 | 4 | 4 | .500 | 0.46 | 45 | 0 | 0 | 0 | 5 | 39.1 | 23 | 2 | 1 | 20 | 26 |
| Seung-yeop Kim | 0-2025 | 3 | 6 | .333 | 3.89 | 33 | 1 | 0 | 0 | 2 | 34.2 | 31 | 15 | 3 | 16 | 19 |
| Jack King | 0-2024 | 9 | 31 | .225 | 6.89 | 58 | 51 | 0 | 0 | 0 | 297.2 | 337 | 228 | 47 | 184 | 241 |
| Rusty King | 3-2021 | 6 | 6 | .500 | 3.58 | 51 | 12 | 0 | 0 | 17 | 118.0 | 108 | 47 | 8 | 31 | 94 |
| Steve King | 0-2023 | 1 | 0 | 1.000 | 3.74 | 19 | 0 | 0 | 0 | 0 | 21.2 | 21 | 9 | 2 | 13 | 17 |
| Terry King | 0-2025 | 5 | 5 | .500 | 4.19 | 24 | 15 | 0 | 0 | 0 | 111.2 | 94 | 52 | 12 | 53 | 74 |
| Erwin Koevoet | 1-2017 | 3 | 3 | .500 | 2.59 | 69 | 0 | 0 | 0 | 0 | 76.1 | 57 | 22 | 4 | 26 | 62 |
| Kenshin Koike | 5-2025 | 27 | 36 | .429 | 4.15 | 113 | 78 | 6 | 0 | 2 | 542.1 | 554 | 250 | 54 | 200 | 401 |
| Terao Kondo | 0-2020 | 0 | 5 | .000 | 11.51 | 7 | 4 | 0 | 0 | 0 | 20.1 | 36 | 26 | 2 | 21 | 4 |
