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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Denman Kane | 2027-2028 | 3 | 1 | .750 | 1.76 | 22 | 0 | 0 | 0 | 3 | 46.0 | 41 | 9 | 1 | 16 | 35 |
| Raimo Kangas | 2029-2030 | 10 | 2 | .833 | 2.36 | 17 | 13 | 2 | 1 | 0 | 106.2 | 87 | 28 | 4 | 25 | 124 |
| Kabeya Kasongo | 2030-2031 | 0 | 15 | .000 | 5.37 | 25 | 25 | 0 | 0 | 0 | 135.2 | 171 | 81 | 13 | 47 | 111 |
| Kentaro Kato | 2030-2031 | 1 | 5 | .167 | 3.60 | 15 | 1 | 0 | 0 | 1 | 50.0 | 53 | 20 | 1 | 15 | 68 |
| Manabu Kato | 2024-2026 | 9 | 5 | .643 | 2.80 | 72 | 0 | 0 | 0 | 12 | 93.1 | 74 | 29 | 6 | 47 | 120 |
| Daniel Katz | 2025-2025 | 1 | 2 | .333 | 2.08 | 5 | 5 | 0 | 0 | 0 | 26.0 | 22 | 6 | 2 | 6 | 19 |
| Kenny Kawaguchi | 2028-2028 | 4 | 3 | .571 | 2.63 | 35 | 0 | 0 | 0 | 17 | 37.2 | 19 | 11 | 3 | 20 | 62 |
| Moses Keijzer | 2031-2032 | 3 | 1 | .750 | 3.35 | 16 | 0 | 0 | 0 | 1 | 43.0 | 43 | 16 | 1 | 18 | 47 |
| Dempster Kelly | 2023-2024 | 0 | 0 | .000 | 2.08 | 23 | 0 | 0 | 0 | 3 | 26.0 | 29 | 6 | 1 | 8 | 34 |
| Greg Kelly | 2020-2020 | 3 | 7 | .300 | 2.72 | 15 | 15 | 2 | 1 | 0 | 102.2 | 96 | 31 | 5 | 27 | 100 |
| Bob Kennedy | 2030-2030 | 2 | 1 | .667 | 3.81 | 13 | 0 | 0 | 0 | 0 | 26.0 | 32 | 11 | 1 | 10 | 40 |
| Rick Kennedy | 2022-2022 | 2 | 5 | .286 | 4.27 | 17 | 10 | 0 | 0 | 0 | 71.2 | 85 | 34 | 1 | 37 | 62 |
| Constantino Kent | 2023-2025 | 6 | 12 | .333 | 4.73 | 54 | 15 | 1 | 0 | 2 | 158.0 | 165 | 83 | 11 | 56 | 166 |
| Guus Ketting | 2020-2024 | 8 | 6 | .571 | 2.44 | 93 | 2 | 0 | 0 | 5 | 133.0 | 109 | 36 | 4 | 62 | 166 |
| Joe Khokar | 2028-2029 | 9 | 3 | .750 | 2.47 | 35 | 0 | 0 | 0 | 8 | 58.1 | 51 | 16 | 2 | 21 | 65 |
| Masujiro Kichida | 2030-2030 | 1 | 1 | .500 | 7.20 | 5 | 1 | 0 | 0 | 0 | 5.0 | 6 | 4 | 1 | 8 | 4 |
| Chae-seong Kim | 2022-2022 | 3 | 3 | .500 | 5.17 | 8 | 8 | 0 | 0 | 0 | 47.0 | 50 | 27 | 0 | 22 | 53 |
| Kyung-nam Kim | 2028-2029 | 0 | 3 | .000 | 3.48 | 23 | 0 | 0 | 0 | 1 | 41.1 | 30 | 16 | 1 | 18 | 66 |
| Ken Kimberlin | 2030-2033 | 3 | 0 | 1.000 | 4.20 | 20 | 0 | 0 | 0 | 0 | 30.0 | 28 | 14 | 2 | 20 | 22 |
| Jon King | 2030-2030 | 4 | 3 | .571 | 3.83 | 7 | 7 | 0 | 0 | 0 | 40.0 | 42 | 17 | 3 | 7 | 50 |
| Will Kirby | 2033-2033 | 7 | 9 | .438 | 3.15 | 22 | 22 | 5 | 2 | 0 | 162.2 | 146 | 57 | 9 | 48 | 171 |
| John Kirk | 2020-2021 | 2 | 1 | .667 | 1.35 | 17 | 0 | 0 | 0 | 4 | 20.0 | 15 | 3 | 1 | 9 | 26 |
| Ids Knegt | 2030-2033 | 7 | 17 | .292 | 3.76 | 51 | 38 | 0 | 0 | 0 | 244.0 | 230 | 102 | 8 | 101 | 224 |
| Stephen Knight | 2030-2031 | 2 | 4 | .333 | 3.72 | 12 | 2 | 0 | 0 | 1 | 38.2 | 48 | 16 | 3 | 10 | 37 |
| Naozane Kobayashi | 2027-2027 | 3 | 5 | .375 | 3.71 | 14 | 12 | 0 | 0 | 0 | 85.0 | 84 | 35 | 3 | 37 | 60 |
| Shusaku Kobayashi | 2027-2030 | 6 | 10 | .375 | 3.22 | 101 | 0 | 0 | 0 | 21 | 187.0 | 158 | 67 | 14 | 81 | 216 |
| Kozue Koga | 2020-2020 | 4 | 4 | .500 | 3.41 | 8 | 8 | 0 | 0 | 0 | 58.0 | 65 | 22 | 1 | 16 | 43 |
| Evan Koopman | 2021-2021 | 0 | 1 | .000 | 2.16 | 14 | 0 | 0 | 0 | 2 | 8.1 | 6 | 2 | 1 | 6 | 4 |
| Eddie Kop | 2021-2021 | 7 | 3 | .700 | 2.06 | 13 | 12 | 1 | 1 | 0 | 91.2 | 71 | 21 | 5 | 29 | 93 |
| Ed Kramer | 2029-2029 | 0 | 1 | .000 | 6.00 | 2 | 0 | 0 | 0 | 0 | 6.0 | 10 | 4 | 0 | 7 | 2 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Glenn Kren | 2029-2029 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.1 | 1 | 0 | 0 | 0 | 4 |
| Maik Kruidenier | 2021-2022 | 7 | 5 | .583 | 4.48 | 49 | 5 | 0 | 0 | 3 | 84.1 | 86 | 42 | 6 | 31 | 78 |
| Yoshida Kudo | 2021-2023 | 13 | 15 | .464 | 3.64 | 42 | 36 | 0 | 0 | 0 | 197.2 | 216 | 80 | 12 | 47 | 167 |
| Toshiharu Kuhabara | 2025-2028 | 20 | 10 | .667 | 2.29 | 129 | 15 | 0 | 0 | 2 | 255.1 | 206 | 65 | 7 | 102 | 325 |
| George Kuhn | 2022-2022 | 5 | 11 | .312 | 3.16 | 21 | 21 | 2 | 1 | 0 | 139.2 | 130 | 49 | 4 | 53 | 92 |
| Hiro Kurasawa | 2026-2028 | 10 | 5 | .667 | 1.77 | 36 | 14 | 3 | 0 | 6 | 132.0 | 84 | 26 | 4 | 33 | 152 |
| Ryunosuke Kurota | 2029-2030 | 12 | 19 | .387 | 3.12 | 45 | 45 | 4 | 1 | 0 | 283.0 | 254 | 98 | 12 | 83 | 321 |
| Nam-shik Kwak | 2032-2033 | 15 | 7 | .682 | 3.16 | 41 | 23 | 2 | 1 | 1 | 213.2 | 190 | 75 | 11 | 86 | 163 |
| Sun Kwan | 2029-2029 | 1 | 1 | .500 | 2.89 | 17 | 0 | 0 | 0 | 1 | 37.1 | 32 | 12 | 2 | 15 | 34 |
| Aletona Kylie | 2033-2033 | 1 | 1 | .500 | 2.84 | 2 | 0 | 0 | 0 | 0 | 6.1 | 4 | 2 | 2 | 3 | 5 |
| Trevor Kyrle | 2029-2029 | 0 | 1 | .000 | 3.00 | 1 | 0 | 0 | 0 | 0 | 3.0 | 1 | 1 | 0 | 2 | 3 |
