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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 |
|---|---|---|---|---|---|---|---|---|---|
| Reginald Kalkman | 2025-2027 | .226 | 0 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Huai-yu Kan | 2015-2022 | .000 | 0 | 0 | 43 | 55 | 0 | 4.67 | 667 |
| Xie-li Kan | 2016-2016 | .372 | 6 | 17 | 0 | 0 | 0 | 0.00 | 0 |
| Zahid Kashani | 2029-2030 | .281 | 21 | 89 | 0 | 0 | 0 | 0.00 | 0 |
| Tamasaburo Kato | 2019-2021 | .340 | 10 | 86 | 0 | 0 | 0 | 0.00 | 0 |
| Daniel Katz | 2028-2028 | .000 | 0 | 0 | 5 | 6 | 1 | 4.94 | 41 |
| Gerald Kaufman | 2028-2028 | .345 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Kenny Kawaguchi | 2030-2031 | .000 | 0 | 0 | 14 | 13 | 0 | 2.92 | 205 |
| Wing-tat Ke | 2024-2024 | .000 | 0 | 0 | 3 | 7 | 0 | 4.83 | 48 |
| Alexandre Keeping | 2031-2031 | .306 | 2 | 28 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Kehoe | 2017-2028 | .000 | 0 | 0 | 16 | 26 | 1 | 5.14 | 332 |
| Gary Kellenberger | 2029-2030 | .000 | 0 | 0 | 13 | 11 | 1 | 4.24 | 100 |
| Dempster Kelly | 2028-2028 | .000 | 0 | 0 | 4 | 3 | 1 | 4.15 | 31 |
| Mike Kelly | 2024-2028 | .200 | 5 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Morton Kelly | 2015-2017 | .298 | 27 | 112 | 0 | 0 | 0 | 0.00 | 0 |
| Thomas Kemp | 2017-2017 | .287 | 4 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Mark Kennedy | 2015-2020 | .276 | 6 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| Rick Kennedy | 2029-2031 | .000 | 0 | 0 | 9 | 2 | 3 | 5.43 | 108 |
| Ron Kennedy | 2021-2022 | .000 | 0 | 0 | 1 | 3 | 6 | 3.56 | 40 |
| Millard Kessler | 2023-2024 | .000 | 0 | 0 | 0 | 5 | 3 | 5.55 | 35 |
| Greg Keys | 2017-2019 | .351 | 16 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Tim Keys | 2017-2018 | .000 | 0 | 0 | 2 | 3 | 2 | 7.80 | 69 |
| Joe Khokar | 2030-2031 | .000 | 0 | 0 | 5 | 7 | 7 | 7.15 | 66 |
| Hirokichi Kichida | 2021-2022 | .000 | 0 | 0 | 7 | 9 | 5 | 3.65 | 130 |
| Wade Killefer | 2027-2030 | .233 | 7 | 69 | 0 | 0 | 0 | 0.00 | 0 |
| Chae-hyeong Kim | 2022-2023 | .281 | 8 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Chang-soo Kim | 2024-2024 | .000 | 0 | 0 | 2 | 4 | 2 | 4.80 | 48 |
| Han-seung Kim | 2021-2021 | .000 | 0 | 0 | 7 | 1 | 5 | 3.95 | 55 |
| Il-gyung Kim | 2020-2020 | .000 | 0 | 0 | 1 | 2 | 0 | 3.27 | 17 |
| Jung-hoon Kim | 2022-2022 | .000 | 0 | 0 | 0 | 1 | 0 | 10.29 | 7 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Sang-yeon Kim | 2021-2025 | .260 | 18 | 130 | 0 | 0 | 0 | 0.00 | 0 |
| Seon-keun Kim | 2022-2027 | .268 | 35 | 178 | 0 | 0 | 0 | 0.00 | 0 |
| Akahele Kimokeo | 2017-2017 | .315 | 4 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Shojiro Kimura | 2020-2020 | .353 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Tanyu Kimura | 2026-2026 | .216 | 4 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Tetsunori Kimura | 2025-2026 | .333 | 0 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Brian King | 2021-2021 | .275 | 1 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Brian King | 2020-2021 | .235 | 3 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Jack King | 2019-2019 | .000 | 0 | 0 | 5 | 7 | 0 | 4.79 | 126 |
| Joe King | 2020-2020 | .000 | 0 | 0 | 5 | 10 | 0 | 5.83 | 76 |
| Rusty King | 2021-2021 | .000 | 0 | 0 | 3 | 2 | 0 | 5.06 | 7 |
| Steve King | 2017-2019 | .000 | 0 | 0 | 14 | 17 | 0 | 5.60 | 195 |
| Zach King | 2018-2019 | .384 | 11 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| John Kirk | 2024-2026 | .000 | 0 | 0 | 9 | 9 | 0 | 3.90 | 121 |
| Tim Kirk | 2017-2019 | .000 | 0 | 0 | 3 | 2 | 1 | 6.50 | 67 |
| Motoshige Kitamura | 2025-2025 | .227 | 5 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Shohei Kiyomizu | 2025-2029 | .250 | 5 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Yosuke Kiyomizu | 2019-2021 | .280 | 5 | 30 | 0 | 0 | 0 | 0.00 | 0 |
| Vincent Klein | 2031-2031 | .258 | 5 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Carroll Kline | 2015-2015 | .297 | 17 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Ludwig Kluge | 2027-2027 | .291 | 11 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Knight | 2022-2022 | .261 | 4 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| Kade Knowles | 2021-2029 | .268 | 1 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Takaaki Kobayashi | 2018-2023 | .274 | 13 | 93 | 0 | 0 | 0 | 0.00 | 0 |
| Kenny Koehler | 2026-2028 | .000 | 0 | 0 | 19 | 22 | 0 | 4.32 | 296 |
| Kozue Koga | 2031-2031 | .000 | 0 | 0 | 1 | 0 | 0 | 8.40 | 12 |
| Lu-fang Koo | 2031-2031 | .256 | 2 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Josef Koper | 2017-2019 | .280 | 21 | 75 | 0 | 0 | 0 | 0.00 | 0 |
| Ole Kos | 2018-2018 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 1 |
| Carlos Kramer | 2019-2031 | .273 | 14 | 62 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Jeff Krause | 2023-2030 | .000 | 0 | 0 | 11 | 13 | 38 | 4.07 | 121 |
| Jeff Krause | 2016-2025 | .000 | 0 | 0 | 14 | 55 | 5 | 7.29 | 173 |
| Johan Kroening | 2031-2031 | .304 | 3 | 21 | 0 | 0 | 0 | 0.00 | 0 |
| John Krog | 2029-2031 | .271 | 4 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Yuki Kudo | 2019-2019 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Deron Kuhn | 2022-2022 | .000 | 0 | 0 | 4 | 3 | 7 | 2.25 | 43 |
| Tristan Kuhn | 2022-2022 | .251 | 1 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Hiro Kurasawa | 2028-2030 | .000 | 0 | 0 | 14 | 9 | 5 | 3.43 | 129 |
| Dale Kurth | 2030-2031 | .167 | 0 | 0 | 5 | 7 | 12 | 5.00 | 52 |
| Jung-hwan Kwon | 2029-2031 | .291 | 8 | 117 | 0 | 0 | 0 | 0.00 | 0 |
