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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Tsuneyo Kakutama | 2018-2028 | .000 | 0 | 0 | 21 | 10 | 6 | 4.56 | 268 |
| Tatsuzo Kamida | 2014-2018 | .213 | 11 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Hirotsugu Kaneko | 2015-2026 | .271 | 97 | 549 | 0 | 0 | 0 | 0.00 | 0 |
| Nobuatsu Kaneko | 2025-2028 | .251 | 40 | 129 | 0 | 0 | 0 | 0.00 | 0 |
| Kazuhiko Kanno | 2013-2027 | .000 | 0 | 0 | 91 | 130 | 2 | 5.68 | 1430 |
| Motoki Kanno | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Yasunobu Kanno | 2019-2022 | .266 | 5 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Gesang Kartosuwiryo | 2025-2027 | .000 | 0 | 0 | 0 | 1 | 0 | 18.00 | 3 |
| Ajdir Kasakya | 2024-2028 | .000 | 0 | 0 | 20 | 21 | 64 | 3.77 | 292 |
| Mulia Kathirithamby | 2023-2028 | .000 | 0 | 0 | 18 | 14 | 71 | 4.05 | 332 |
| Akira Kato | 2021-2028 | .281 | 50 | 292 | 0 | 0 | 0 | 0.00 | 0 |
| Maresuke Kato | 2019-2020 | .299 | 12 | 48 | 0 | 0 | 0 | 0.00 | 0 |
| Tadasuke Kato | 2018-2028 | .000 | 0 | 0 | 75 | 103 | 0 | 5.25 | 971 |
| Yasushi Kato | 2019-2028 | .280 | 96 | 377 | 0 | 0 | 0 | 0.00 | 0 |
| John Keith | 2020-2026 | .000 | 0 | 0 | 29 | 31 | 2 | 5.52 | 278 |
| Justin Keller | 2017-2017 | .000 | 0 | 0 | 0 | 1 | 0 | 3.46 | 8 |
| Joseph Kelley | 2025-2028 | .000 | 0 | 0 | 3 | 2 | 3 | 3.35 | 109 |
| John Kelly | 2017-2023 | .244 | 109 | 431 | 0 | 0 | 0 | 0.00 | 0 |
| Peter Kelly | 2012-2021 | .295 | 81 | 408 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Kennedy | 2018-2028 | .261 | 95 | 303 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Kenner | 2021-2021 | .000 | 0 | 0 | 4 | 3 | 1 | 5.87 | 29 |
| Jeff Kent | 2017-2025 | .284 | 17 | 214 | 0 | 0 | 0 | 0.00 | 0 |
| Moritz Kenter | 2026-2026 | .000 | 0 | 0 | 0 | 0 | 0 | 8.53 | 3 |
| Adam Kerr | 2019-2028 | .278 | 123 | 534 | 0 | 0 | 0 | 0.00 | 0 |
| Davey Kerracher | 2017-2021 | .000 | 0 | 0 | 1 | 0 | 3 | 4.12 | 85 |
| Kalidas Keskar | 2023-2027 | .000 | 0 | 0 | 7 | 16 | 1 | 5.95 | 93 |
| Ed Kessler | 2022-2027 | .286 | 82 | 297 | 0 | 0 | 0 | 0.00 | 0 |
| Abdul Razzaq Kharoti | 2024-2028 | .000 | 0 | 0 | 22 | 18 | 106 | 3.01 | 330 |
| Ijaz Kharoti | 2028-2028 | .000 | 0 | 0 | 7 | 1 | 1 | 3.17 | 98 |
| Nakamaro Kichida | 2025-2025 | .000 | 0 | 0 | 1 | 0 | 0 | 9.72 | 8 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Yoriyuki Kichida | 2025-2025 | .000 | 0 | 0 | 1 | 0 | 0 | 10.36 | 9 |
| Hoang Kieu | 2027-2028 | .147 | 0 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Shusui Kikuchi | 2021-2028 | .270 | 31 | 184 | 0 | 0 | 0 | 0.00 | 0 |
| Suezo Kikuchi | 2020-2023 | .000 | 0 | 0 | 1 | 2 | 1 | 7.67 | 11 |
| Chong-hyeon Kim | 2028-2028 | .000 | 0 | 0 | 1 | 1 | 0 | 5.00 | 13 |
| Hae-nim Kim | 2028-2028 | .279 | 0 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Ji-hyun Kim | 2027-2028 | .254 | 6 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Sang-soo Kim | 2027-2027 | .255 | 3 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Yeong-il Kim | 2028-2028 | 1.000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Yeong-suk Kim | 2024-2028 | .000 | 0 | 0 | 23 | 45 | 0 | 6.04 | 320 |
| Jong-min Kim Jr. | 2021-2028 | .302 | 278 | 917 | 0 | 0 | 0 | 0.00 | 0 |
| Jeff Kimball | 2020-2028 | .000 | 0 | 0 | 102 | 73 | 2 | 4.18 | 904 |
| Jun'ichi Kimura | 2022-2025 | .000 | 0 | 0 | 4 | 5 | 1 | 6.75 | 43 |
| Yoshihisa Kimura | 2022-2027 | .303 | 7 | 101 | 0 | 0 | 0 | 0.00 | 0 |
| Henry King | 2021-2021 | .267 | 1 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Jim King | 2018-2020 | .000 | 0 | 0 | 2 | 2 | 0 | 8.45 | 28 |
| Leon King | 2015-2028 | .000 | 0 | 0 | 58 | 35 | 72 | 3.43 | 932 |
| Ryan Kirby | 2019-2021 | .245 | 20 | 44 | 0 | 0 | 0 | 0.00 | 0 |
| Victor Kirkland | 2018-2020 | .000 | 0 | 0 | 6 | 9 | 1 | 5.40 | 91 |
| Tomiichi Kishita | 2017-2023 | .293 | 8 | 121 | 0 | 0 | 0 | 0.00 | 0 |
| Soshu Kitamura | 2015-2017 | .331 | 0 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Hideyori Kiyomizu | 2014-2023 | .312 | 229 | 895 | 0 | 0 | 0 | 0.00 | 0 |
| Ryoichi Kiyomizu | 2027-2027 | .237 | 7 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Peter Klein | 2012-2022 | .000 | 0 | 0 | 57 | 44 | 52 | 3.67 | 845 |
| Tom Klein | 2012-2021 | .301 | 200 | 831 | 0 | 0 | 0 | 0.00 | 0 |
| Kakuzo Kobayashi | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 6 |
| Mitsunari Kobayashi | 2028-2028 | .000 | 0 | 0 | 17 | 6 | 0 | 3.69 | 143 |
| Mitsuo Kobayashi | 2028-2028 | .000 | 0 | 0 | 4 | 9 | 0 | 7.13 | 74 |
| Mitsuzuka Kobayashi | 2018-2028 | .218 | 39 | 127 | 0 | 0 | 0 | 0.00 | 0 |
| Takanibu Kobayashi | 2015-2028 | .275 | 41 | 605 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Yoshino Kobayashi | 2021-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Toshiki Koda | 2016-2027 | .000 | 0 | 0 | 62 | 74 | 8 | 5.55 | 673 |
| Kenkichi Kodo | 2028-2028 | .000 | 0 | 0 | 1 | 3 | 17 | 3.62 | 34 |
| Mashashi Kogawa | 2014-2024 | .253 | 134 | 609 | 0 | 0 | 0 | 0.00 | 0 |
| Tokutomi Kogawa | 2022-2028 | .296 | 187 | 589 | 0 | 0 | 0 | 0.00 | 0 |
| Sadao Koizumi | 2022-2022 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Kojuro Kojima | 2025-2028 | .000 | 0 | 0 | 7 | 18 | 2 | 5.15 | 177 |
| Matsuyo Kokawa | 2019-2019 | .000 | 0 | 0 | 0 | 0 | 0 | 5.23 | 15 |
| Misao Kokawa | 2017-2020 | .272 | 16 | 58 | 0 | 0 | 0 | 0.00 | 0 |
| Masuhiro Kondo | 2021-2021 | .000 | 0 | 0 | 1 | 0 | 0 | 4.78 | 19 |
| Norinaga Kondo | 2017-2018 | .241 | 3 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Mokichi Kono | 2019-2028 | .266 | 107 | 356 | 0 | 0 | 0 | 0.00 | 0 |
| Gerard Kotas | 2027-2028 | .000 | 0 | 0 | 4 | 9 | 0 | 6.25 | 82 |
| Monzaemon Kouda | 2027-2028 | .263 | 4 | 22 | 0 | 0 | 0 | 0.00 | 0 |
| Naofumi Kouda | 2015-2021 | .000 | 0 | 0 | 15 | 14 | 41 | 5.13 | 438 |
| Kazuhiro Kouno | 2022-2025 | .000 | 0 | 0 | 7 | 8 | 0 | 9.42 | 76 |
| Zale Kountouroudas | 2015-2017 | .227 | 4 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Clement Kramer | 2019-2021 | .000 | 0 | 0 | 5 | 16 | 1 | 8.39 | 92 |
| Bing-de Ku | 2027-2027 | .000 | 0 | 0 | 2 | 0 | 0 | 4.79 | 38 |
| Myung-joo Ku | 2028-2028 | .113 | 2 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Motonobu Kubo | 2025-2028 | .252 | 25 | 76 | 0 | 0 | 0 | 0.00 | 0 |
| Tofeeq Kuchis | 2024-2028 | .245 | 16 | 84 | 0 | 0 | 0 | 0.00 | 0 |
| Oda Kudo | 2018-2028 | .000 | 0 | 0 | 97 | 90 | 4 | 5.60 | 1570 |
| Satoshi Kuhabara | 2021-2026 | .216 | 8 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Jaikirti Kumawagra | 2026-2026 | .258 | 2 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Anenas Kunwarjit | 2022-2027 | .000 | 0 | 0 | 9 | 15 | 4 | 6.68 | 141 |
| Amad Kuram | 2025-2028 | .271 | 70 | 198 | 0 | 0 | 0 | 0.00 | 0 |
| Gusti Kusuma | 2027-2028 | .000 | 0 | 0 | 5 | 0 | 5 | 4.47 | 69 |
| Chun-yeong Kwon | 2026-2028 | .238 | 40 | 122 | 0 | 0 | 0 | 0.00 | 0 |
