| Most Unearned Runs Allowed | |||||||
|---|---|---|---|---|---|---|---|
| Player | Team | Year | Age | IP | R | ER | UER |
| Dao-zi Mai | LAD | 2031 | 31 | 161.2 | 104 | 81 | 23 |
| Austin Cox | LAD | 2033 | 36 | 149.2 | 108 | 86 | 22 |
| Josh Paden | DET | 2031 | 26 | 171.1 | 94 | 73 | 21 |
| Aaron Nola | LAD | 2025 | 32 | 177.0 | 107 | 88 | 19 |
| Emerson Hancock | NYM,TEX | 2033 | 34 | 121.1 | 71 | 52 | 19 |
| Kevin Gausman | LAD,LAA | 2025 | 34 | 152.1 | 92 | 73 | 19 |
| Nick Lodolo | WSH | 2027 | 29 | 187.0 | 91 | 72 | 19 |
| Franklin Medina | CHC | 2032 | 28 | 197.2 | 110 | 91 | 19 |
| Jim Hinkle | DET | 2036 | 30 | 75.0 | 57 | 38 | 19 |
| Danny Moya | MIN | 2033 | 24 | 189.2 | 107 | 88 | 19 |
| Josh Hendrickson | MON | 2027 | 29 | 104.1 | 87 | 69 | 18 |
| Francisco Morales | ARI | 2031 | 31 | 152.1 | 89 | 71 | 18 |
| Parker Dunshee | OAK | 2028 | 33 | 180.2 | 119 | 101 | 18 |
| Willie Weiss | BOS | 2032 | 32 | 199.2 | 96 | 78 | 18 |
| Bruce Esparza | LAA | 2034 | 27 | 210.1 | 102 | 84 | 18 |
| Ezra Sheridan | MIN | 2032 | 28 | 219.2 | 108 | 90 | 18 |
| Jaden Macon | DET | 2039 | 29 | 171.2 | 97 | 79 | 18 |
| Jamie Taylor | MTL | 2034 | 27 | 209.1 | 79 | 61 | 18 |
| Sixto Sanchez | WSH | 2025 | 26 | 149.2 | 91 | 74 | 17 |
| Ken Giles | LAA | 2025 | 34 | 70.0 | 37 | 20 | 17 |