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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tsuneyo Kakutama | 2018-2028 | 21 | 10 | .677 | 4.56 | 242 | 2 | 0 | 0 | 6 | 381.0 | 411 | 193 | 50 | 167 | 268 |
| Kazuhiko Kanno | 2013-2027 | 91 | 130 | .412 | 5.68 | 371 | 316 | 12 | 2 | 2 | 1896.1 | 2222 | 1197 | 316 | 778 | 1430 |
| Le-song Kao | 2030-2030 | 0 | 0 | .000 | 6.59 | 7 | 0 | 0 | 0 | 0 | 13.2 | 18 | 10 | 2 | 7 | 16 |
| Bowo Kartodirdjo | 2029-2030 | 1 | 0 | 1.000 | 9.56 | 9 | 1 | 0 | 0 | 0 | 16.0 | 16 | 17 | 6 | 8 | 18 |
| Gesang Kartosuwiryo | 2025-2029 | 1 | 1 | .500 | 11.57 | 12 | 0 | 0 | 0 | 0 | 16.1 | 29 | 21 | 6 | 11 | 13 |
| Ajdir Kasakya | 2024-2031 | 32 | 25 | .561 | 4.03 | 372 | 0 | 0 | 0 | 68 | 398.0 | 375 | 178 | 58 | 156 | 416 |
| Mulia Kathirithamby | 2023-2033 | 36 | 27 | .571 | 3.92 | 456 | 0 | 0 | 0 | 120 | 571.2 | 556 | 249 | 66 | 153 | 583 |
| Kaoru Kato | 2029-2030 | 1 | 2 | .333 | 5.57 | 4 | 3 | 0 | 0 | 0 | 21.0 | 25 | 13 | 5 | 10 | 17 |
| Tadasuke Kato | 2018-2029 | 78 | 107 | .422 | 5.26 | 294 | 242 | 2 | 1 | 2 | 1447.2 | 1859 | 846 | 270 | 321 | 1013 |
| Thomas Kearton | 2031-2033 | 5 | 4 | .556 | 4.07 | 65 | 0 | 0 | 0 | 1 | 121.2 | 124 | 55 | 13 | 46 | 80 |
| Samuel Keeble | 2029-2030 | 0 | 0 | .000 | 4.50 | 21 | 0 | 0 | 0 | 0 | 46.0 | 49 | 23 | 4 | 21 | 35 |
| Willi Kehr | 2033-2033 | 0 | 4 | .000 | 5.22 | 10 | 10 | 0 | 0 | 0 | 39.2 | 49 | 23 | 5 | 14 | 35 |
| John Keith | 2020-2026 | 29 | 31 | .483 | 5.52 | 170 | 63 | 3 | 0 | 2 | 573.2 | 693 | 352 | 53 | 247 | 278 |
| Justin Keller | 2017-2017 | 0 | 1 | .000 | 3.46 | 2 | 2 | 0 | 0 | 0 | 13.0 | 12 | 5 | 1 | 10 | 8 |
| Joseph Kelley | 2025-2033 | 11 | 8 | .579 | 3.09 | 266 | 0 | 0 | 0 | 5 | 297.0 | 278 | 102 | 35 | 84 | 273 |
| Jonathan Kelly | 2031-2031 | 2 | 3 | .400 | 5.20 | 8 | 8 | 0 | 0 | 0 | 45.0 | 39 | 26 | 7 | 33 | 18 |
| Joe Kenner | 2021-2021 | 4 | 3 | .571 | 5.87 | 12 | 8 | 0 | 0 | 1 | 53.2 | 58 | 35 | 10 | 21 | 29 |
| Moritz Kenter | 2026-2026 | 0 | 0 | .000 | 8.53 | 3 | 0 | 0 | 0 | 0 | 6.1 | 15 | 6 | 1 | 2 | 3 |
| Davey Kerracher | 2017-2021 | 1 | 0 | 1.000 | 4.12 | 68 | 0 | 0 | 0 | 3 | 111.1 | 107 | 51 | 14 | 42 | 85 |
| Kalidas Keskar | 2023-2027 | 7 | 16 | .304 | 5.95 | 50 | 24 | 1 | 0 | 1 | 186.0 | 242 | 123 | 21 | 64 | 93 |
| Phil Kettenring | 2032-2032 | 0 | 2 | .000 | 4.22 | 10 | 0 | 0 | 0 | 4 | 10.2 | 8 | 5 | 2 | 7 | 8 |
| Abdul Razzaq Kharoti | 2024-2033 | 51 | 42 | .548 | 2.97 | 586 | 0 | 0 | 0 | 170 | 615.2 | 542 | 203 | 44 | 207 | 661 |
| Ijaz Kharoti | 2028-2033 | 36 | 20 | .643 | 3.63 | 182 | 53 | 2 | 0 | 10 | 580.2 | 516 | 234 | 90 | 133 | 535 |
| Nakamaro Kichida | 2025-2025 | 1 | 0 | 1.000 | 9.72 | 7 | 0 | 0 | 0 | 0 | 8.1 | 17 | 9 | 3 | 3 | 8 |
| Yoriyuki Kichida | 2025-2025 | 1 | 0 | 1.000 | 10.36 | 16 | 2 | 0 | 0 | 0 | 24.1 | 42 | 28 | 6 | 10 | 9 |
| Suezo Kikuchi | 2020-2023 | 1 | 2 | .333 | 7.67 | 70 | 0 | 0 | 0 | 1 | 27.0 | 37 | 23 | 3 | 15 | 11 |
| Chong-hyeon Kim | 2028-2032 | 4 | 5 | .444 | 3.41 | 64 | 0 | 0 | 0 | 3 | 92.1 | 76 | 35 | 6 | 48 | 113 |
| Yeong-suk Kim | 2024-2028 | 23 | 45 | .338 | 6.04 | 94 | 87 | 0 | 0 | 0 | 457.2 | 513 | 307 | 71 | 177 | 320 |
| Jeff Kimball | 2020-2029 | 114 | 82 | .582 | 4.19 | 298 | 286 | 13 | 3 | 2 | 1807.2 | 2130 | 841 | 169 | 347 | 1011 |
| Jun'ichi Kimura | 2022-2025 | 4 | 5 | .444 | 6.75 | 57 | 9 | 0 | 0 | 1 | 101.1 | 145 | 76 | 17 | 48 | 43 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Jim King | 2018-2020 | 2 | 2 | .500 | 8.45 | 37 | 0 | 0 | 0 | 0 | 54.1 | 85 | 51 | 10 | 23 | 28 |
| Leon King | 2015-2029 | 58 | 39 | .598 | 3.42 | 860 | 0 | 0 | 0 | 74 | 983.1 | 893 | 374 | 94 | 391 | 962 |
| Victor Kirkland | 2018-2020 | 6 | 9 | .400 | 5.40 | 50 | 15 | 3 | 0 | 1 | 148.1 | 159 | 89 | 40 | 37 | 91 |
| Peter Klein | 2012-2022 | 57 | 44 | .564 | 3.67 | 692 | 40 | 0 | 0 | 52 | 1025.0 | 1029 | 418 | 47 | 372 | 845 |
| Junji Kobayashi | 2029-2033 | 6 | 16 | .273 | 6.14 | 67 | 21 | 0 | 0 | 2 | 202.1 | 283 | 138 | 42 | 79 | 117 |
| Kakuzo Kobayashi | 2027-2029 | 0 | 1 | .000 | 2.65 | 25 | 0 | 0 | 0 | 0 | 34.0 | 32 | 10 | 4 | 7 | 41 |
| Mitsunari Kobayashi | 2028-2033 | 95 | 42 | .693 | 3.24 | 179 | 179 | 8 | 1 | 0 | 1202.0 | 1034 | 433 | 146 | 439 | 1300 |
| Mitsuo Kobayashi | 2028-2033 | 60 | 65 | .480 | 4.93 | 183 | 179 | 16 | 1 | 0 | 1177.2 | 1260 | 645 | 188 | 433 | 939 |
| Naomi Kobayashi | 2030-2033 | 5 | 25 | .167 | 5.88 | 97 | 36 | 1 | 0 | 1 | 355.0 | 451 | 232 | 62 | 146 | 210 |
| Toshiki Koda | 2016-2027 | 62 | 74 | .456 | 5.55 | 297 | 175 | 0 | 0 | 8 | 1114.0 | 1266 | 687 | 138 | 450 | 673 |
| Kenkichi Kodo | 2028-2033 | 16 | 28 | .364 | 2.96 | 324 | 0 | 0 | 0 | 60 | 325.0 | 343 | 107 | 23 | 101 | 284 |
| Kojuro Kojima | 2025-2033 | 19 | 38 | .333 | 5.06 | 159 | 75 | 0 | 0 | 3 | 531.2 | 623 | 299 | 84 | 165 | 413 |
| Yoshiaki Kojima | 2032-2033 | 6 | 11 | .353 | 4.61 | 24 | 24 | 4 | 1 | 0 | 148.1 | 149 | 76 | 18 | 50 | 116 |
| Matsuyo Kokawa | 2019-2019 | 0 | 0 | .000 | 5.23 | 15 | 0 | 0 | 0 | 0 | 31.0 | 28 | 18 | 5 | 15 | 15 |
| Yuki Kokawa | 2033-2033 | 2 | 1 | .667 | 4.07 | 13 | 0 | 0 | 0 | 1 | 24.1 | 30 | 11 | 4 | 4 | 21 |
| Hidekazu Komatsu | 2032-2032 | 0 | 0 | .000 | 3.07 | 5 | 0 | 0 | 0 | 0 | 14.2 | 15 | 5 | 1 | 11 | 13 |
| Masuhiro Kondo | 2021-2021 | 1 | 0 | 1.000 | 4.78 | 11 | 0 | 0 | 0 | 0 | 26.1 | 36 | 14 | 8 | 7 | 19 |
| Gerard Kotas | 2027-2033 | 33 | 55 | .375 | 5.04 | 120 | 114 | 13 | 2 | 0 | 709.0 | 843 | 397 | 118 | 170 | 424 |
| Naofumi Kouda | 2015-2021 | 15 | 14 | .517 | 5.13 | 347 | 0 | 0 | 0 | 41 | 395.0 | 380 | 225 | 70 | 193 | 438 |
| Kazuhiro Kouno | 2022-2025 | 7 | 8 | .467 | 9.42 | 34 | 14 | 0 | 0 | 0 | 99.1 | 174 | 104 | 38 | 29 | 76 |
| Mitsuzuka Koyama | 2032-2033 | 8 | 6 | .571 | 5.33 | 28 | 19 | 0 | 0 | 0 | 147.0 | 195 | 87 | 26 | 23 | 85 |
| Clement Kramer | 2019-2021 | 5 | 16 | .238 | 8.39 | 91 | 20 | 0 | 0 | 1 | 197.1 | 305 | 184 | 37 | 93 | 92 |
| Bing-de Ku | 2027-2027 | 2 | 0 | 1.000 | 4.79 | 23 | 0 | 0 | 0 | 0 | 47.0 | 48 | 25 | 3 | 23 | 38 |
| Oda Kudo | 2018-2029 | 105 | 96 | .522 | 5.56 | 396 | 275 | 9 | 0 | 4 | 1907.1 | 2291 | 1178 | 448 | 279 | 1666 |
| Anenas Kunwarjit | 2022-2027 | 9 | 15 | .375 | 6.68 | 147 | 10 | 1 | 0 | 4 | 268.0 | 323 | 199 | 33 | 121 | 141 |
| Shunji Kurota | 2030-2031 | 1 | 1 | .500 | 3.95 | 17 | 1 | 0 | 0 | 1 | 41.0 | 40 | 18 | 7 | 18 | 26 |
| Gusti Kusuma | 2027-2030 | 8 | 2 | .800 | 5.19 | 97 | 0 | 0 | 0 | 7 | 145.2 | 148 | 84 | 19 | 68 | 111 |
