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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 |
| Zahid Kashani | 2026-2026 | .193 | 1 | 17 | 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 | 2025-2026 | .000 | 0 | 0 | 7 | 2 | 1 | 0.57 | 88 |
| Nuno Kechlmaier | 2025-2025 | .000 | 0 | 0 | 2 | 0 | 0 | 2.13 | 11 |
| 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 |
| Scott Kerin | 2025-2025 | .244 | 7 | 44 | 0 | 0 | 0 | 0.00 | 0 |
| Adrian Kezer | 2025-2025 | .071 | 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 |
| Song-saeng Kim | 2021-2024 | .000 | 0 | 0 | 19 | 8 | 1 | 2.33 | 244 |
| 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 |
| Tyler Kinjeketile | 2025-2026 | .247 | 1 | 46 | 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 |
| 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 |
| 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 | 2026-2026 | .215 | 4 | 29 | 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 |
| Brian Krick | 2026-2026 | .000 | 0 | 0 | 3 | 6 | 23 | 3.99 | 65 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| 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 |
