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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 | 1-2019 | 11 | 2 | .846 | 2.48 | 20 | 18 | 0 | 0 | 0 | 130.2 | 100 | 36 | 7 | 31 | 137 |
| Manabu Kato | 0-2026 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 1 | 0 |
| Daniel Katz | 0-2026 | 5 | 5 | .500 | 4.00 | 20 | 9 | 0 | 0 | 0 | 63.0 | 63 | 28 | 2 | 26 | 33 |
| Ezekiel Kee | 0-2022 | 1 | 0 | 1.000 | 4.35 | 7 | 0 | 0 | 0 | 1 | 10.1 | 11 | 5 | 1 | 7 | 2 |
| Joe Kehoe | 2-2019 | 10 | 14 | .417 | 3.57 | 36 | 36 | 0 | 0 | 0 | 214.1 | 206 | 85 | 19 | 62 | 216 |
| Dempster Kelly | 0-2026 | 2 | 3 | .400 | 3.40 | 31 | 0 | 0 | 0 | 6 | 42.1 | 43 | 16 | 2 | 26 | 28 |
| Greg Kelly | 1-2020 | 5 | 15 | .250 | 4.88 | 36 | 25 | 0 | 0 | 4 | 151.1 | 176 | 82 | 6 | 79 | 76 |
| Millard Kessler | 0-2017 | 3 | 5 | .375 | 5.86 | 41 | 0 | 0 | 0 | 0 | 50.2 | 76 | 33 | 7 | 18 | 43 |
| Guus Ketting | 0-2026 | 3 | 7 | .300 | 6.15 | 42 | 0 | 0 | 0 | 1 | 52.2 | 59 | 36 | 6 | 45 | 40 |
| Hirokichi Kichida | 0-2021 | 1 | 0 | 1.000 | 0.00 | 7 | 0 | 0 | 0 | 1 | 8.2 | 1 | 0 | 0 | 4 | 11 |
| Dae-il Kim | 1-2025 | 10 | 14 | .417 | 4.89 | 53 | 20 | 1 | 0 | 5 | 171.0 | 179 | 93 | 12 | 110 | 106 |
| Il-gyung Kim | 7-2026 | 34 | 41 | .453 | 4.19 | 175 | 101 | 2 | 2 | 4 | 655.1 | 631 | 305 | 60 | 324 | 592 |
| Jack King | 3-2026 | 18 | 14 | .562 | 4.47 | 42 | 42 | 1 | 0 | 0 | 237.2 | 242 | 118 | 21 | 132 | 265 |
| John Kirk | -1-2026 | 4 | 2 | .667 | 4.35 | 55 | 0 | 0 | 0 | 7 | 68.1 | 81 | 33 | 11 | 41 | 65 |
| Tim Kirk | 0-2017 | 0 | 2 | .000 | 9.35 | 15 | 0 | 0 | 0 | 1 | 8.2 | 11 | 9 | 2 | 6 | 7 |
| Kozue Koga | -1-2024 | 6 | 12 | .333 | 5.92 | 57 | 23 | 0 | 0 | 0 | 155.0 | 184 | 102 | 10 | 102 | 58 |
| Evan Koopman | 0-2022 | 1 | 0 | 1.000 | 2.25 | 5 | 0 | 0 | 0 | 0 | 8.0 | 5 | 2 | 1 | 3 | 6 |
| Eddie Kop | 0-2021 | 2 | 1 | .667 | 3.92 | 6 | 3 | 0 | 0 | 0 | 20.2 | 21 | 9 | 2 | 12 | 13 |
| Jeff Krause | 0-2016 | 3 | 1 | .750 | 5.86 | 26 | 3 | 0 | 0 | 4 | 55.1 | 58 | 36 | 6 | 40 | 34 |
| Maik Kruidenier | 0-2019 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 0 | 1.2 | 3 | 0 | 0 | 0 | 2 |
| Yoshida Kudo | 0-2026 | 5 | 7 | .417 | 5.54 | 41 | 22 | 0 | 0 | 1 | 105.2 | 116 | 65 | 15 | 58 | 49 |
