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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 | 2022-2023 | 2 | 3 | .400 | 5.25 | 11 | 10 | 0 | 0 | 0 | 48.0 | 50 | 28 | 5 | 25 | 32 |
| Xie-li Kan | 2013-2022 | 0 | 0 | .000 | 5.40 | 1 | 1 | 0 | 0 | 0 | 3.1 | 3 | 2 | 0 | 3 | 0 |
| Tetsuzan Kaneko | 2018-2027 | 17 | 15 | .531 | 3.00 | 88 | 41 | 3 | 2 | 6 | 318.0 | 319 | 106 | 32 | 56 | 235 |
| Makoto Kato | 2019-2024 | 28 | 32 | .467 | 4.17 | 123 | 70 | 7 | 0 | 3 | 555.0 | 519 | 257 | 80 | 163 | 408 |
| John Kaufman | 2017-2032 | 134 | 85 | .612 | 3.15 | 315 | 292 | 27 | 7 | 0 | 1996.1 | 1667 | 699 | 179 | 650 | 1847 |
| Kenny Kawaguchi | 2033-2034 | 1 | 1 | .500 | 5.10 | 15 | 0 | 0 | 0 | 0 | 42.1 | 42 | 24 | 2 | 33 | 33 |
| Joe Kehoe | 2022-2028 | 6 | 11 | .353 | 3.79 | 42 | 23 | 0 | 0 | 1 | 142.2 | 140 | 60 | 17 | 47 | 96 |
| Gerald Keller | 2030-2034 | 36 | 23 | .610 | 3.95 | 84 | 77 | 0 | 0 | 1 | 485.2 | 490 | 213 | 61 | 131 | 390 |
| Jeff Kelly | 2014-2014 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 0.2 | 3 | 0 | 0 | 0 | 0 |
| Ron Kennedy | 2014-2015 | 1 | 2 | .333 | 5.77 | 32 | 0 | 0 | 0 | 1 | 48.1 | 60 | 31 | 4 | 34 | 43 |
| Oscar Kenselaar | 2034-2034 | 1 | 5 | .167 | 4.33 | 12 | 10 | 1 | 0 | 0 | 62.1 | 70 | 30 | 10 | 28 | 47 |
| Ma Hon Keung | 2031-2033 | 0 | 2 | .000 | 4.63 | 18 | 0 | 0 | 0 | 1 | 23.1 | 21 | 12 | 3 | 10 | 11 |
| Chang-soo Kim | 2023-2023 | 0 | 1 | .000 | 15.00 | 5 | 0 | 0 | 0 | 0 | 3.0 | 4 | 5 | 2 | 4 | 6 |
| Il-gyung Kim | 2020-2020 | 2 | 1 | .667 | 3.75 | 14 | 2 | 0 | 0 | 0 | 48.0 | 44 | 20 | 7 | 25 | 25 |
| Joong-geun Kim | 2021-2023 | 5 | 8 | .385 | 4.76 | 70 | 0 | 0 | 0 | 12 | 90.2 | 96 | 48 | 8 | 44 | 59 |
| Neil King | 2013-2014 | 0 | 2 | .000 | 4.38 | 39 | 0 | 0 | 0 | 1 | 49.1 | 56 | 24 | 5 | 21 | 34 |
| Rusty King | 2015-2021 | 7 | 3 | .700 | 3.47 | 45 | 4 | 0 | 0 | 0 | 85.2 | 88 | 33 | 3 | 33 | 66 |
| Steve King | 2015-2023 | 7 | 26 | .212 | 5.42 | 40 | 40 | 0 | 0 | 0 | 247.1 | 281 | 149 | 37 | 133 | 145 |
| Gene Kirkland | 2018-2032 | 32 | 26 | .552 | 2.58 | 415 | 0 | 0 | 0 | 111 | 513.1 | 412 | 147 | 39 | 161 | 528 |
| Kenny Koehler | 2028-2030 | 11 | 10 | .524 | 4.95 | 32 | 32 | 0 | 0 | 0 | 191.0 | 203 | 105 | 26 | 59 | 148 |
| Masami Kogawa | 2032-2034 | 8 | 8 | .500 | 2.95 | 52 | 2 | 0 | 0 | 2 | 119.0 | 90 | 39 | 8 | 63 | 82 |
| Eddie Kop | 2025-2034 | 33 | 30 | .524 | 3.24 | 86 | 85 | 9 | 1 | 0 | 563.2 | 542 | 203 | 43 | 120 | 438 |
| Ole Kos | 2018-2027 | 47 | 37 | .560 | 3.25 | 388 | 2 | 0 | 0 | 42 | 531.0 | 434 | 192 | 66 | 180 | 528 |
| Jeff Krause | 2019-2026 | 10 | 15 | .400 | 3.66 | 83 | 18 | 1 | 0 | 8 | 214.0 | 188 | 87 | 20 | 75 | 138 |
| Shinzo Kumagai | 2029-2034 | 9 | 1 | .900 | 3.45 | 57 | 0 | 0 | 0 | 5 | 94.0 | 89 | 36 | 10 | 44 | 100 |
| Hiro Kurasawa | 2030-2034 | 2 | 5 | .286 | 4.28 | 38 | 6 | 0 | 0 | 9 | 82.0 | 81 | 39 | 9 | 22 | 44 |
| Ryunosuke Kurota | 2033-2034 | 8 | 14 | .364 | 4.20 | 31 | 31 | 1 | 0 | 0 | 182.1 | 152 | 85 | 20 | 97 | 121 |
| Dale Kurth | 2030-2034 | 3 | 6 | .333 | 4.73 | 44 | 4 | 1 | 0 | 2 | 93.1 | 99 | 49 | 12 | 35 | 89 |
