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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rob Kaminsky | 2020-2024 | 12 | 15 | .444 | 4.17 | 70 | 35 | 0 | 0 | 1 | 226.2 | 258 | 105 | 28 | 65 | 166 |
| Nate Karns | 2015-2023 | 66 | 90 | .423 | 4.59 | 239 | 221 | 4 | 4 | 1 | 1266.0 | 1256 | 646 | 148 | 528 | 1203 |
| Takeru Kawakami | 2023-2025 | 9 | 9 | .500 | 4.15 | 158 | 0 | 0 | 0 | 4 | 165.0 | 115 | 76 | 19 | 109 | 246 |
| Scott Kazmir | 2015-2017 | 6 | 7 | .462 | 4.99 | 78 | 0 | 0 | 0 | 3 | 124.1 | 128 | 69 | 8 | 57 | 117 |
| Mitch Keller | 2020-2021 | 9 | 14 | .391 | 4.84 | 41 | 41 | 0 | 0 | 0 | 206.1 | 221 | 111 | 26 | 90 | 168 |
| Stephen Keller | 2021-2025 | 29 | 38 | .433 | 4.61 | 121 | 81 | 2 | 1 | 0 | 536.1 | 540 | 275 | 72 | 180 | 479 |
| Shawn Kelley | 2015-2017 | 8 | 5 | .615 | 2.83 | 175 | 0 | 0 | 0 | 12 | 152.2 | 103 | 48 | 12 | 62 | 195 |
| Toby Kelly | 2022-2025 | 35 | 20 | .636 | 3.47 | 90 | 90 | 2 | 2 | 0 | 516.0 | 461 | 199 | 44 | 188 | 473 |
| Ian Kennedy | 2015-2022 | 61 | 59 | .508 | 4.60 | 186 | 171 | 8 | 1 | 0 | 1060.1 | 1147 | 542 | 126 | 358 | 877 |
| Clayton Kershaw | 2015-2025 | 119 | 104 | .534 | 3.70 | 332 | 300 | 33 | 12 | 1 | 2025.2 | 2034 | 832 | 223 | 427 | 1869 |
| Dallas Keuchel | 2015-2023 | 60 | 55 | .522 | 3.67 | 473 | 68 | 4 | 1 | 14 | 1034.2 | 1030 | 422 | 80 | 334 | 710 |
| Tyler Keysor | 2021-2025 | 44 | 34 | .564 | 3.89 | 112 | 112 | 3 | 0 | 0 | 652.2 | 613 | 282 | 65 | 195 | 559 |
| Shinsaku Kichida | 2024-2025 | 4 | 7 | .364 | 5.79 | 63 | 0 | 0 | 0 | 2 | 93.1 | 116 | 60 | 8 | 54 | 76 |
| Trey Killian | 2020-2025 | 0 | 0 | .000 | 3.86 | 10 | 0 | 0 | 0 | 0 | 23.1 | 17 | 10 | 1 | 9 | 27 |
| Tong-myeon Kim | 2021-2024 | 16 | 6 | .727 | 2.96 | 64 | 28 | 1 | 1 | 1 | 191.2 | 169 | 63 | 16 | 59 | 176 |
| Craig Kimbrel | 2015-2022 | 31 | 36 | .463 | 2.70 | 496 | 0 | 0 | 0 | 225 | 503.0 | 309 | 151 | 33 | 293 | 677 |
| Toshiki Kimura | 2025-2025 | 4 | 1 | .800 | 3.31 | 32 | 0 | 0 | 0 | 0 | 35.1 | 24 | 13 | 2 | 16 | 41 |
| Charles King | 2023-2025 | 22 | 38 | .367 | 4.10 | 81 | 80 | 2 | 0 | 0 | 461.0 | 451 | 210 | 54 | 133 | 386 |
| Nick Kingham | 2017-2025 | 34 | 48 | .415 | 4.75 | 175 | 120 | 4 | 1 | 3 | 801.1 | 798 | 423 | 138 | 285 | 628 |
| Nolan Kingham | 2022-2025 | 5 | 5 | .500 | 5.47 | 22 | 18 | 0 | 0 | 0 | 100.1 | 128 | 61 | 17 | 35 | 63 |
| Jason Kipnis | 2015-2018 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 |
| Nathan Kirby | 2024-2024 | 6 | 1 | .857 | 3.74 | 67 | 0 | 0 | 0 | 0 | 101.0 | 92 | 42 | 12 | 37 | 103 |
| Phil Klein | 2018-2025 | 45 | 47 | .489 | 3.97 | 515 | 18 | 0 | 0 | 163 | 590.0 | 487 | 260 | 53 | 379 | 605 |
| Corey Kluber | 2015-2024 | 78 | 88 | .470 | 4.76 | 256 | 227 | 10 | 2 | 2 | 1443.2 | 1535 | 764 | 234 | 401 | 1114 |
| Corey Knebel | 2015-2018 | 7 | 10 | .412 | 4.98 | 177 | 0 | 0 | 0 | 8 | 227.2 | 208 | 126 | 33 | 136 | 232 |
| Chris Kohler | 2021-2025 | 5 | 4 | .556 | 4.69 | 80 | 0 | 0 | 0 | 2 | 111.1 | 102 | 58 | 20 | 53 | 110 |
| Tyler Kolek | 2021-2025 | 10 | 21 | .323 | 5.48 | 172 | 3 | 0 | 0 | 32 | 254.2 | 224 | 155 | 49 | 145 | 313 |
| Michael Kopech | 2022-2025 | 15 | 7 | .682 | 3.95 | 153 | 0 | 0 | 0 | 8 | 264.0 | 226 | 116 | 43 | 90 | 273 |
| Sandy Koufax | 1955-2025 | 72 | 49 | .595 | 4.17 | 188 | 181 | 8 | 3 | 0 | 1097.1 | 1043 | 509 | 118 | 413 | 1090 |
| Jackson Kowar | 2019-2025 | 62 | 62 | .500 | 4.29 | 202 | 202 | 4 | 3 | 0 | 1131.2 | 1021 | 540 | 171 | 385 | 1208 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Max Kranick | 2024-2025 | 17 | 22 | .436 | 5.11 | 77 | 38 | 1 | 0 | 2 | 271.0 | 285 | 154 | 36 | 116 | 261 |
| Matt Krook | 2020-2025 | 62 | 56 | .525 | 4.72 | 163 | 162 | 4 | 1 | 0 | 952.1 | 983 | 499 | 133 | 282 | 689 |
