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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Donat Karczmarek | 2029-2029 | 0 | 0 | .000 | 6.75 | 4 | 0 | 0 | 0 | 0 | 4.0 | 8 | 3 | 1 | 2 | 3 |
| Gary Kellenberger | 2028-2028 | 5 | 5 | .500 | 2.44 | 22 | 10 | 0 | 0 | 0 | 84.2 | 76 | 23 | 5 | 23 | 58 |
| John Keller | 2015-2016 | 4 | 7 | .364 | 5.02 | 58 | 0 | 0 | 0 | 26 | 52.0 | 52 | 29 | 8 | 33 | 64 |
| Jeren Kendall | 2026-2027 | 6 | 6 | .500 | 4.05 | 54 | 7 | 0 | 0 | 0 | 120.0 | 122 | 54 | 6 | 59 | 75 |
| Rick Kennedy | 2023-2023 | 4 | 4 | .500 | 5.47 | 29 | 0 | 0 | 0 | 3 | 51.0 | 49 | 31 | 7 | 47 | 46 |
| Millard Kessler | 2017-2017 | 0 | 0 | .000 | 6.75 | 1 | 0 | 0 | 0 | 0 | 1.1 | 3 | 1 | 0 | 0 | 2 |
| Guus Ketting | 2025-2025 | 4 | 1 | .800 | 4.10 | 27 | 0 | 0 | 0 | 0 | 37.1 | 39 | 17 | 4 | 18 | 35 |
| Mike Keys | 2027-2027 | 1 | 4 | .200 | 4.66 | 31 | 0 | 0 | 0 | 2 | 48.1 | 45 | 25 | 3 | 34 | 39 |
| Tim Keys | 2015-2016 | 2 | 3 | .400 | 6.22 | 38 | 0 | 0 | 0 | 1 | 50.2 | 59 | 35 | 7 | 26 | 49 |
| Kyeong-min Ki | 2018-2019 | 0 | 0 | .000 | 3.10 | 11 | 0 | 0 | 0 | 1 | 29.0 | 25 | 10 | 3 | 12 | 27 |
| Hirokichi Kichida | 2018-2020 | 22 | 21 | .512 | 4.14 | 66 | 66 | 1 | 1 | 0 | 352.1 | 344 | 162 | 32 | 122 | 397 |
| Jack King | 2025-2026 | 16 | 15 | .516 | 3.72 | 42 | 42 | 1 | 1 | 0 | 259.0 | 234 | 107 | 19 | 98 | 223 |
| Joe King | 2019-2019 | 2 | 5 | .286 | 4.92 | 10 | 10 | 0 | 0 | 0 | 53.0 | 65 | 29 | 4 | 12 | 58 |
| Terry King | 2022-2022 | 1 | 0 | 1.000 | 6.43 | 11 | 0 | 0 | 0 | 0 | 7.0 | 10 | 5 | 1 | 3 | 6 |
| Tim Kirk | 2015-2016 | 4 | 2 | .667 | 4.67 | 60 | 0 | 0 | 0 | 12 | 54.0 | 65 | 28 | 11 | 19 | 41 |
| Kozue Koga | 2023-2024 | 3 | 7 | .300 | 4.02 | 22 | 22 | 0 | 0 | 0 | 96.1 | 91 | 43 | 5 | 48 | 66 |
| Terao Kondo | 2019-2019 | 1 | 3 | .250 | 6.57 | 39 | 0 | 0 | 0 | 0 | 61.2 | 90 | 45 | 9 | 32 | 63 |
| Evan Koopman | 2022-2022 | 0 | 0 | .000 | 12.06 | 16 | 0 | 0 | 0 | 2 | 15.2 | 29 | 21 | 1 | 14 | 6 |
| Eddie Kop | 2020-2020 | 0 | 0 | .000 | 0.00 | 1 | 1 | 0 | 0 | 0 | 7.1 | 6 | 0 | 0 | 3 | 5 |
| Riemer Kos | 2027-2027 | 1 | 0 | 1.000 | 3.35 | 23 | 0 | 0 | 0 | 1 | 37.2 | 36 | 14 | 5 | 25 | 24 |
| Stephen Kramer | 2016-2017 | 6 | 9 | .400 | 4.92 | 45 | 15 | 1 | 1 | 12 | 115.1 | 124 | 63 | 13 | 57 | 102 |
| Jeff Krause | 2017-2018 | 2 | 3 | .400 | 5.35 | 7 | 7 | 0 | 0 | 0 | 35.1 | 35 | 21 | 4 | 10 | 36 |
| Dale Kurth | 2027-2027 | 1 | 2 | .333 | 2.54 | 22 | 2 | 0 | 0 | 1 | 46.0 | 41 | 13 | 1 | 20 | 40 |
