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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 | 2024-2024 | .500 | 0 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Dahab Kanda | 2027-2027 | .000 | 0 | 0 | 4 | 7 | 0 | 2.95 | 86 |
| Donat Karczmarek | 2029-2029 | .000 | 0 | 0 | 5 | 8 | 0 | 4.08 | 136 |
| Zahid Kashani | 2026-2027 | .207 | 6 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Manabu Kato | 2022-2023 | .000 | 0 | 0 | 4 | 8 | 10 | 3.91 | 70 |
| Gerald Kaufman | 2022-2023 | .216 | 0 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Kenny Kawaguchi | 2025-2027 | .000 | 0 | 0 | 9 | 7 | 6 | 1.29 | 145 |
| Nuno Kechlmaier | 2025-2025 | .000 | 0 | 0 | 2 | 0 | 0 | 2.13 | 11 |
| Moses Keijzer | 2029-2029 | .000 | 0 | 0 | 5 | 3 | 0 | 4.19 | 62 |
| Kenny Keiper | 2027-2027 | .000 | 0 | 0 | 0 | 3 | 0 | 3.26 | 26 |
| Nick Kelley | 2029-2029 | .000 | 0 | 0 | 5 | 6 | 12 | 2.17 | 53 |
| Francis Kelly | 2020-2024 | .252 | 4 | 49 | 0 | 0 | 0 | 0.00 | 0 |
| Howard Kelly | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Mark Kennedy | 2021-2021 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ben Kennerly | 2025-2025 | .318 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Lloyd Kent | 2025-2025 | .260 | 3 | 17 | 0 | 0 | 0 | 0.00 | 0 |
| Victor Kent | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 2 | 2.51 | 13 |
| Scott Kerin | 2025-2025 | .244 | 7 | 44 | 0 | 0 | 0 | 0.00 | 0 |
| Doruk Keyder | 2029-2029 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 5 |
| Mark Keys | 2027-2027 | .296 | 2 | 22 | 0 | 0 | 0 | 0.00 | 0 |
| Adrian Kezer | 2025-2028 | .062 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Jay Kidd | 2022-2022 | .213 | 0 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Chae-seong Kim | 2021-2022 | .000 | 0 | 0 | 18 | 8 | 0 | 2.34 | 256 |
| Dae-il Kim | 2023-2026 | .000 | 0 | 0 | 1 | 0 | 0 | 5.54 | 12 |
| Min-chin Kim | 2029-2029 | .000 | 0 | 0 | 11 | 2 | 0 | 1.78 | 128 |
| Song-saeng Kim | 2021-2024 | .000 | 0 | 0 | 19 | 8 | 1 | 2.33 | 244 |
| Colby King | 2029-2029 | .309 | 11 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Jon King | 2028-2029 | .000 | 0 | 0 | 9 | 13 | 0 | 3.33 | 146 |
| Noel King | 2022-2022 | .247 | 4 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Terry King | 2022-2022 | .000 | 0 | 0 | 4 | 1 | 0 | 2.14 | 34 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Tyler Kinjeketile | 2025-2027 | .246 | 3 | 83 | 0 | 0 | 0 | 0.00 | 0 |
| Tucker Kinney | 2029-2029 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Willis Kirkendall | 2025-2025 | .164 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Vincent Klein | 2020-2021 | .210 | 2 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Ids Knegt | 2028-2029 | .000 | 0 | 0 | 6 | 16 | 0 | 4.06 | 115 |
| Chris Knight | 2028-2029 | .197 | 1 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Meka Knight | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Tyler Knopp | 2025-2025 | .235 | 1 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Bob Knutson | 2029-2029 | .240 | 3 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Naozane Kobayashi | 2028-2029 | .000 | 0 | 0 | 3 | 8 | 1 | 3.80 | 74 |
| Tsuginori Kobayashi | 2027-2029 | .212 | 22 | 79 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Koch | 2024-2026 | .248 | 3 | 97 | 0 | 0 | 0 | 0.00 | 0 |
| Kozue Koga | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 1 |
| Hou Kong | 2026-2029 | .247 | 11 | 89 | 0 | 0 | 0 | 0.00 | 0 |
| Lu-fang Koo | 2028-2029 | .273 | 2 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Eddie Kop | 2020-2022 | .000 | 0 | 0 | 8 | 18 | 0 | 3.09 | 266 |
| Paddy Kos | 2020-2023 | .222 | 0 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Riemer Kos | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 2 | 0.50 | 19 |
| Yoshi Kouda | 2028-2029 | .225 | 6 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Brian Krick | 2026-2026 | .000 | 0 | 0 | 3 | 6 | 23 | 3.99 | 65 |
| Johan Kroening | 2029-2029 | .258 | 2 | 22 | 0 | 0 | 0 | 0.00 | 0 |
| John Krog | 2027-2027 | .254 | 6 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Shi-xian Kuai | 2027-2029 | .000 | 0 | 0 | 8 | 9 | 0 | 3.40 | 160 |
| Yoshida Kudo | 2020-2020 | .000 | 0 | 0 | 1 | 3 | 0 | 3.34 | 33 |
| George Kuhn | 2023-2026 | .000 | 0 | 0 | 3 | 2 | 1 | 3.19 | 44 |
| Jerry Kumpf | 2029-2029 | .000 | 0 | 0 | 1 | 1 | 0 | 3.35 | 46 |
| Ryunosuke Kurota | 2028-2028 | .000 | 0 | 0 | 5 | 7 | 0 | 3.28 | 90 |
| Dale Kurth | 2027-2029 | .000 | 0 | 0 | 0 | 3 | 4 | 3.38 | 20 |
| Elroy Kwasnik | 2029-2029 | .241 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Lester Kwiatkowski | 2028-2028 | .199 | 1 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Jin Kwon | 2027-2029 | .000 | 0 | 0 | 12 | 13 | 45 | 2.72 | 159 |
| Trevor Kyrle | 2028-2028 | .000 | 0 | 0 | 0 | 0 | 0 | 7.42 | 16 |
