| Most Unearned Runs Allowed | |||||||
|---|---|---|---|---|---|---|---|
| Player | Team | Year | Age | IP | R | ER | UER |
| Alec Marsh | KC | 2023 | 25 | 175.2 | 108 | 91 | 17 |
| Hogan Harris | OAK | 2023 | 26 | 134.1 | 95 | 79 | 16 |
| JT Brubaker | PIT | 2024 | 30 | 175.2 | 108 | 93 | 15 |
| Mick Abel | PHI | 2024 | 22 | 101.1 | 70 | 55 | 15 |
| Marcus Stroman | CHC | 2024 | 33 | 180.2 | 98 | 84 | 14 |
| Clayton Kershaw | LAD | 2023 | 35 | 186.2 | 97 | 84 | 13 |
| Jake Woodford | STL | 2023 | 26 | 163.1 | 115 | 102 | 13 |
| Kyle Harrison | SF | 2024 | 22 | 156.0 | 90 | 77 | 13 |
| Walker Buehler | LAD | 2023 | 28 | 259.1 | 117 | 105 | 12 |
| Jonathan Stiever | CWS | 2024 | 27 | 129.1 | 94 | 82 | 12 |
| Hunter Greene | AZ | 2023 | 23 | 182.2 | 119 | 107 | 12 |
| Drew Rucinski | OAK | 2023 | 34 | 189.0 | 139 | 127 | 12 |
| Dylan Cease | CWS | 2024 | 28 | 182.2 | 84 | 73 | 11 |
| Bailey Ober | MIN | 2024 | 28 | 161.2 | 92 | 81 | 11 |
| Braxton Garrett | MIA | 2023 | 25 | 178.0 | 109 | 98 | 11 |
| Chris Sale | BOS,MIN | 2024 | 35 | 161.0 | 93 | 82 | 11 |
| Spencer Strider | ATL | 2023 | 24 | 234.2 | 106 | 95 | 11 |
| Ky Bush | CWS | 2023 | 23 | 151.0 | 105 | 94 | 11 |
| John Means | BAL | 2023 | 30 | 217.2 | 115 | 105 | 10 |
| John Means | MIL | 2024 | 31 | 164.0 | 100 | 90 | 10 |