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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 | 2023-2023 | 4 | 5 | .444 | 4.51 | 21 | 20 | 0 | 0 | 0 | 109.2 | 107 | 55 | 12 | 48 | 58 |
| Tetsuzan Kaneko | 2018-2027 | 22 | 21 | .512 | 3.36 | 68 | 61 | 4 | 0 | 0 | 402.1 | 390 | 150 | 41 | 100 | 270 |
| Makoto Kato | 2018-2027 | 18 | 15 | .545 | 3.64 | 49 | 49 | 7 | 1 | 0 | 348.1 | 317 | 141 | 49 | 94 | 224 |
| Daniel Katz | 2029-2031 | 9 | 8 | .529 | 3.43 | 92 | 4 | 0 | 0 | 25 | 178.2 | 151 | 68 | 13 | 75 | 139 |
| John Kaufman | 2015-2029 | 14 | 12 | .538 | 4.09 | 72 | 25 | 1 | 0 | 7 | 200.0 | 176 | 91 | 11 | 108 | 144 |
| Wing-tat Ke | 2022-2022 | 1 | 1 | .500 | 9.64 | 7 | 5 | 0 | 0 | 0 | 28.0 | 45 | 30 | 5 | 10 | 13 |
| Joe Kehoe | 2020-2027 | 23 | 27 | .460 | 4.47 | 140 | 61 | 0 | 0 | 2 | 424.2 | 407 | 211 | 47 | 164 | 345 |
| Gerald Keller | 2030-2030 | 7 | 1 | .875 | 1.87 | 11 | 11 | 0 | 0 | 0 | 77.0 | 48 | 16 | 4 | 26 | 57 |
| John Keller | 2015-2026 | 4 | 6 | .400 | 5.09 | 61 | 3 | 0 | 0 | 2 | 93.2 | 109 | 53 | 13 | 48 | 75 |
| Bill Kelly | 2016-2019 | 7 | 7 | .500 | 5.95 | 29 | 20 | 0 | 0 | 0 | 110.1 | 130 | 73 | 17 | 70 | 64 |
| Ron Kennedy | 2015-2018 | 8 | 3 | .727 | 3.56 | 83 | 0 | 0 | 0 | 3 | 98.2 | 95 | 39 | 16 | 34 | 87 |
| Millard Kessler | 2021-2021 | 0 | 0 | .000 | 1.64 | 5 | 0 | 0 | 0 | 0 | 11.0 | 9 | 2 | 0 | 2 | 8 |
| Ma Hon Keung | 2031-2031 | 0 | 1 | .000 | 4.34 | 11 | 0 | 0 | 0 | 1 | 18.2 | 18 | 9 | 1 | 3 | 15 |
| Hirokichi Kichida | 2023-2024 | 3 | 4 | .429 | 3.18 | 20 | 20 | 0 | 0 | 0 | 107.2 | 96 | 38 | 5 | 41 | 81 |
| Chang-soo Kim | 2022-2022 | 0 | 0 | .000 | 1.35 | 9 | 0 | 0 | 0 | 0 | 6.2 | 2 | 1 | 0 | 2 | 9 |
| Joong-geun Kim | 2021-2023 | 7 | 7 | .500 | 2.86 | 56 | 0 | 0 | 0 | 9 | 78.2 | 68 | 25 | 6 | 29 | 64 |
| Jung-hoon Kim | 2018-2020 | 22 | 14 | .611 | 3.31 | 61 | 50 | 0 | 0 | 1 | 310.0 | 260 | 114 | 46 | 71 | 254 |
| Jack King | 2027-2027 | 1 | 0 | 1.000 | 5.76 | 22 | 0 | 0 | 0 | 4 | 25.0 | 23 | 16 | 6 | 12 | 23 |
| Joe King | 2014-2015 | 14 | 17 | .452 | 6.16 | 43 | 43 | 2 | 0 | 0 | 219.0 | 251 | 150 | 34 | 98 | 184 |
| Rusty King | 2016-2018 | 4 | 1 | .800 | 3.21 | 52 | 0 | 0 | 0 | 27 | 56.0 | 47 | 20 | 9 | 16 | 63 |
| Steve King | 2016-2021 | 12 | 8 | .600 | 4.27 | 63 | 25 | 0 | 0 | 1 | 213.0 | 211 | 101 | 28 | 82 | 164 |
| Gene Kirkland | 2017-2030 | 12 | 6 | .667 | 2.34 | 139 | 0 | 0 | 0 | 15 | 161.1 | 118 | 42 | 12 | 47 | 177 |
| Kenny Koehler | 2028-2031 | 3 | 9 | .250 | 6.77 | 19 | 19 | 0 | 0 | 0 | 98.1 | 132 | 74 | 11 | 56 | 64 |
| Erwin Koevoet | 2014-2015 | 5 | 1 | .833 | 3.72 | 31 | 0 | 0 | 0 | 5 | 36.1 | 30 | 15 | 4 | 20 | 30 |
| Masami Kogawa | 2031-2031 | 9 | 6 | .600 | 3.05 | 21 | 21 | 1 | 0 | 0 | 150.1 | 115 | 51 | 15 | 49 | 124 |
| Kenshin Koike | 2020-2027 | 6 | 20 | .231 | 5.05 | 37 | 35 | 0 | 0 | 0 | 173.0 | 187 | 97 | 30 | 64 | 133 |
| Eddie Kop | 2023-2030 | 49 | 30 | .620 | 2.86 | 104 | 104 | 12 | 8 | 0 | 714.1 | 581 | 227 | 46 | 183 | 654 |
| Stephen Kramer | 2015-2015 | 0 | 0 | .000 | 9.00 | 2 | 0 | 0 | 0 | 0 | 2.0 | 3 | 2 | 1 | 2 | 2 |
| Jeff Krause | 2019-2021 | 15 | 7 | .682 | 3.33 | 43 | 27 | 5 | 1 | 2 | 210.2 | 199 | 78 | 21 | 73 | 120 |
| Deron Kuhn | 2023-2023 | 1 | 1 | .500 | 4.38 | 23 | 1 | 0 | 0 | 3 | 51.1 | 60 | 25 | 10 | 21 | 22 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Shinzo Kumagai | 2030-2030 | 5 | 4 | .556 | 3.16 | 37 | 0 | 0 | 0 | 13 | 57.0 | 54 | 20 | 7 | 21 | 81 |
