| Most Unearned Runs Allowed | |||||||
|---|---|---|---|---|---|---|---|
| Player | Team | Year | Age | IP | R | ER | UER |
| Zach Argo | CWS | 2032 | 32 | 180.1 | 119 | 96 | 23 |
| German Marquez | ARI | 2026 | 31 | 153.1 | 100 | 78 | 22 |
| Ben Stucker | CHC | 2028 | 24 | 207.2 | 151 | 130 | 21 |
| Noah Syndergaard | BOS | 2029 | 36 | 215.0 | 105 | 85 | 20 |
| Carlos Perez | OAK | 2027 | 25 | 169.2 | 107 | 87 | 20 |
| Eddie Billings | CLE | 2028 | 26 | 167.0 | 123 | 103 | 20 |
| Cris Perez | NO | 2030 | 24 | 197.1 | 108 | 88 | 20 |
| Ryan Yarbrough | MTL | 2022 | 30 | 219.0 | 112 | 93 | 19 |
| Josh Potts | TOR | 2029 | 25 | 173.1 | 68 | 49 | 19 |
| Ed Davis | CLE | 2033 | 30 | 190.2 | 113 | 94 | 19 |
| Mike Soroka | ATL | 2026 | 28 | 216.2 | 95 | 77 | 18 |
| Dakota Hudson | ATL | 2025 | 30 | 168.0 | 112 | 94 | 18 |
| Oscar Soto | MIN | 2033 | 29 | 213.1 | 81 | 63 | 18 |
| Kyle Wright | COL | 2024 | 28 | 217.1 | 109 | 92 | 17 |
| Bailey Ober | SF | 2023 | 27 | 197.0 | 91 | 74 | 17 |
| Daniel Espino | NYY | 2027 | 26 | 123.1 | 103 | 86 | 17 |
| Wade Miley | CIN | 2020 | 33 | 93.1 | 82 | 65 | 17 |
| Dave Mahler | PHI | 2029 | 24 | 148.2 | 75 | 58 | 17 |
| Johnny Ramirez | BOS | 2031 | 29 | 178.2 | 95 | 78 | 17 |
| Skyler Rosales | LAA | 2032 | 25 | 174.1 | 85 | 68 | 17 |