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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 |
|---|---|---|---|---|---|---|---|---|---|
| Connor Kaiser | 2019-2021 | .111 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Rob Kaminsky | 2020-2024 | .000 | 0 | 0 | 12 | 15 | 1 | 4.17 | 166 |
| Jung-Ho Kang | 2015-2017 | .213 | 29 | 106 | 0 | 0 | 0 | 0.00 | 0 |
| Nate Karns | 2015-2023 | .000 | 0 | 0 | 66 | 90 | 1 | 4.59 | 1203 |
| Gosuke Katoh | 2021-2023 | .417 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Kazuya Katsuki | 2023-2023 | .330 | 1 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Shingo Kawabata | 2017-2017 | .246 | 1 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Takeru Kawakami | 2023-2025 | .000 | 0 | 0 | 9 | 9 | 4 | 4.15 | 246 |
| Scott Kazmir | 2015-2017 | .000 | 0 | 0 | 6 | 7 | 3 | 4.99 | 117 |
| Mitch Keller | 2020-2021 | .000 | 0 | 0 | 9 | 14 | 0 | 4.84 | 168 |
| Stephen Keller | 2021-2025 | .000 | 0 | 0 | 29 | 38 | 0 | 4.61 | 479 |
| Shawn Kelley | 2015-2017 | .000 | 0 | 0 | 8 | 5 | 12 | 2.83 | 195 |
| Carson Kelly | 2023-2023 | .170 | 1 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Dalton Kelly | 2020-2025 | .256 | 143 | 414 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Kelly | 2022-2022 | .143 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Toby Kelly | 2022-2025 | .000 | 0 | 0 | 35 | 20 | 0 | 3.47 | 473 |
| Matt Kemp | 2015-2022 | .247 | 138 | 469 | 0 | 0 | 0 | 0.00 | 0 |
| Jeren Kendall | 2024-2025 | .333 | 2 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Howie Kendrick | 2015-2016 | .245 | 8 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Kolton Kendrick | 2022-2022 | .167 | 8 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Ian Kennedy | 2015-2022 | .000 | 0 | 0 | 61 | 59 | 0 | 4.60 | 877 |
| Clayton Kershaw | 2015-2025 | .000 | 0 | 0 | 119 | 104 | 1 | 3.70 | 1869 |
| Dallas Keuchel | 2015-2023 | .000 | 0 | 0 | 60 | 55 | 14 | 3.67 | 710 |
| Brent Keys | 2017-2019 | .267 | 2 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Tyler Keysor | 2021-2025 | .000 | 0 | 0 | 44 | 34 | 0 | 3.89 | 559 |
| Shinsaku Kichida | 2024-2025 | .000 | 0 | 0 | 4 | 7 | 2 | 5.79 | 76 |
| Kevin Kiermaier | 2015-2019 | .262 | 21 | 142 | 0 | 0 | 0 | 0.00 | 0 |
| Trey Killian | 2020-2025 | .000 | 0 | 0 | 0 | 0 | 0 | 3.86 | 27 |
| Tong-myeon Kim | 2021-2024 | .000 | 0 | 0 | 16 | 6 | 1 | 2.96 | 176 |
| Craig Kimbrel | 2015-2022 | .000 | 0 | 0 | 31 | 36 | 225 | 2.70 | 677 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Toshiki Kimura | 2025-2025 | .000 | 0 | 0 | 4 | 1 | 0 | 3.31 | 41 |
| Charles King | 2023-2025 | .000 | 0 | 0 | 22 | 38 | 0 | 4.10 | 386 |
| Nick Kingham | 2017-2025 | .000 | 0 | 0 | 34 | 48 | 3 | 4.75 | 628 |
| Nolan Kingham | 2022-2025 | .000 | 0 | 0 | 5 | 5 | 0 | 5.47 | 63 |
| Ian Kinsler | 2015-2016 | .277 | 13 | 59 | 0 | 0 | 0 | 0.00 | 0 |
| Jason Kipnis | 2015-2018 | .271 | 14 | 77 | 0 | 0 | 0 | 0.00 | 0 |
| Nathan Kirby | 2024-2024 | .000 | 0 | 0 | 6 | 1 | 0 | 3.74 | 103 |
| Alex Kirilloff | 2021-2025 | .263 | 19 | 88 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Kivlehan | 2016-2023 | .247 | 45 | 221 | 0 | 0 | 0 | 0.00 | 0 |
| Nobuhiko Kiyomizu | 2025-2025 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Phil Klein | 2018-2025 | .000 | 0 | 0 | 45 | 47 | 163 | 3.97 | 605 |
| Corey Kluber | 2015-2024 | .000 | 0 | 0 | 78 | 88 | 2 | 4.76 | 1114 |
| Andrew Knapp | 2018-2022 | .237 | 16 | 83 | 0 | 0 | 0 | 0.00 | 0 |
| Corey Knebel | 2015-2018 | .000 | 0 | 0 | 7 | 10 | 8 | 4.98 | 232 |
| Chris Kohler | 2021-2025 | .000 | 0 | 0 | 5 | 4 | 2 | 4.69 | 110 |
| Tyler Kolek | 2021-2025 | .000 | 0 | 0 | 10 | 21 | 32 | 5.48 | 313 |
| Katsuyoshi Kondo | 2023-2025 | .275 | 9 | 82 | 0 | 0 | 0 | 0.00 | 0 |
| Kensuke Kondo | 2020-2024 | .254 | 48 | 173 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Kopech | 2022-2025 | .000 | 0 | 0 | 15 | 7 | 8 | 3.95 | 273 |
| Sandy Koufax | 1955-2025 | .000 | 0 | 0 | 72 | 49 | 0 | 4.17 | 1090 |
| Jackson Kowar | 2019-2025 | .000 | 0 | 0 | 62 | 62 | 0 | 4.29 | 1208 |
| Max Kranick | 2024-2025 | .000 | 0 | 0 | 17 | 22 | 2 | 5.11 | 261 |
| Matt Krook | 2020-2025 | .000 | 0 | 0 | 62 | 56 | 0 | 4.72 | 689 |
