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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hisaaki Kanai | 2025-2026 | 1 | 5 | .167 | 5.77 | 39 | 26 | 0 | 0 | 0 | 68.2 | 81 | 44 | 14 | 36 | 21 |
| Kyoshi Kano | 2024-2026 | 7 | 10 | .412 | 8.58 | 55 | 17 | 0 | 0 | 0 | 164.2 | 252 | 157 | 47 | 78 | 65 |
| Bohdan Kasatkin | 2024-2025 | 7 | 3 | .700 | 5.51 | 17 | 3 | 0 | 0 | 0 | 67.0 | 73 | 41 | 16 | 38 | 49 |
| Jonathan Kellerstrass | 2026-2026 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 1 | 2.0 | 1 | 0 | 0 | 0 | 2 |
| Aaron Kent | 2024-2025 | 7 | 9 | .438 | 6.11 | 58 | 6 | 0 | 0 | 17 | 94.1 | 125 | 64 | 23 | 29 | 76 |
| Nick Kern | 2024-2025 | 20 | 4 | .833 | 3.01 | 39 | 38 | 0 | 0 | 0 | 212.0 | 224 | 71 | 9 | 42 | 144 |
| Kevin Kerns | 2024-2024 | 1 | 3 | .250 | 5.76 | 18 | 0 | 0 | 0 | 1 | 29.2 | 34 | 19 | 7 | 11 | 28 |
| Shu-de Khu | 2025-2025 | 1 | 0 | 1.000 | 2.45 | 8 | 0 | 0 | 0 | 2 | 7.1 | 8 | 2 | 0 | 2 | 5 |
| Jeremy Killian | 2025-2025 | 1 | 0 | 1.000 | 3.86 | 4 | 0 | 0 | 0 | 3 | 4.2 | 4 | 2 | 0 | 2 | 3 |
| Mitsukuni Kishi | 2025-2025 | 0 | 1 | .000 | 24.00 | 1 | 1 | 0 | 0 | 0 | 3.0 | 5 | 8 | 4 | 4 | 0 |
| Masanori Kishimoto | 2024-2026 | 6 | 23 | .207 | 6.92 | 92 | 54 | 0 | 0 | 2 | 244.1 | 342 | 188 | 42 | 131 | 145 |
| Carl Klein | 2025-2025 | 0 | 1 | .000 | 13.50 | 2 | 0 | 0 | 0 | 0 | 2.2 | 7 | 4 | 2 | 2 | 2 |
| Justin Knittle | 2024-2025 | 3 | 7 | .300 | 4.57 | 17 | 16 | 0 | 0 | 0 | 90.2 | 100 | 46 | 12 | 35 | 66 |
| Joe Knoop | 2024-2024 | 0 | 0 | .000 | 27.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 5 | 3 | 0 | 1 | 1 |
| Jamie Knudson | 2025-2025 | 0 | 1 | .000 | 11.05 | 3 | 1 | 0 | 0 | 0 | 7.1 | 10 | 9 | 2 | 6 | 7 |
| Tom Koch | 2025-2025 | 1 | 5 | .167 | 4.57 | 14 | 14 | 0 | 0 | 0 | 61.0 | 67 | 31 | 7 | 42 | 39 |
| David Koontz | 2024-2024 | 3 | 0 | 1.000 | 3.16 | 15 | 1 | 0 | 0 | 1 | 25.2 | 36 | 9 | 0 | 6 | 29 |
| Adrian Krautheim | 2025-2025 | 0 | 0 | .000 | 0.00 | 1 | 1 | 0 | 0 | 0 | 3.0 | 2 | 0 | 0 | 2 | 1 |
| Nate Kreps | 2024-2025 | 6 | 10 | .375 | 6.32 | 42 | 30 | 0 | 0 | 0 | 178.0 | 231 | 125 | 35 | 85 | 141 |
| Eric Kretzer | 2026-2026 | 1 | 0 | 1.000 | 1.00 | 1 | 1 | 1 | 0 | 0 | 9.0 | 6 | 1 | 1 | 0 | 5 |
| Dan Krieg | 2025-2025 | 4 | 4 | .500 | 4.94 | 34 | 13 | 0 | 0 | 1 | 71.0 | 62 | 39 | 4 | 51 | 47 |
| Xiao-yong Kuai | 2026-2026 | 0 | 1 | .000 | 2.08 | 1 | 1 | 0 | 0 | 0 | 4.1 | 5 | 1 | 0 | 2 | 3 |
| Jace Kuc | 2025-2025 | 1 | 0 | 1.000 | 2.87 | 18 | 0 | 0 | 0 | 2 | 31.1 | 35 | 10 | 2 | 7 | 26 |
| Cody Kucharski | 2024-2024 | 2 | 4 | .333 | 7.71 | 8 | 8 | 0 | 0 | 0 | 39.2 | 45 | 34 | 11 | 24 | 43 |
| Jon Kwait | 2024-2024 | 1 | 0 | 1.000 | 1.29 | 1 | 1 | 0 | 0 | 0 | 7.0 | 6 | 1 | 1 | 0 | 4 |
| Seung-kab Kym | 2025-2026 | 0 | 2 | .000 | 10.22 | 5 | 2 | 0 | 0 | 1 | 12.1 | 24 | 14 | 5 | 7 | 8 |
| Zach Kyte | 2026-2026 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.2 | 3 | 0 | 0 | 2 | 2 |
| Brian Kyzar | 2025-2025 | 0 | 1 | .000 | 6.75 | 4 | 0 | 0 | 0 | 2 | 4.0 | 9 | 3 | 0 | 1 | 4 |
