| Most Unearned Runs Allowed | |||||||
|---|---|---|---|---|---|---|---|
| Player | Team | Year | Age | IP | R | ER | UER |
| Osamu Ito | CHC | 2046 | 31 | 193.2 | 201 | 173 | 28 |
| Hank Wyse | HOU | 2050 | 29 | 212.2 | 155 | 128 | 27 |
| Phil Niekro | ATL | 2049 | 34 | 251.1 | 159 | 132 | 27 |
| Jim Nash | BOS | 2042 | 29 | 186.1 | 136 | 110 | 26 |
| Vean Gregg | CWS | 2039 | 27 | 243.2 | 139 | 113 | 26 |
| Paul Maholm | ?? | 2057 | 32 | 176.0 | 120 | 95 | 25 |
| Joe Horlen | ?? | 2032 | 30 | 214.1 | 124 | 99 | 25 |
| Bert Inks | COL | 2046 | 21 | 188.0 | 142 | 118 | 24 |
| Francisco Cordova | LAD | 2057 | 30 | 151.0 | 113 | 89 | 24 |
| Juan Paula | CWS | 2046 | 31 | 232.1 | 123 | 100 | 23 |
| Jorge Escareno | ?? | 2041 | 23 | 235.1 | 132 | 109 | 23 |
| Henry Boyle | ?? | 2053 | 27 | 191.2 | 134 | 111 | 23 |
| Roger Wolff | MON | 2062 | 43 | 208.0 | 150 | 127 | 23 |
| Joe Moeller | ?? | 2053 | 28 | 239.2 | 170 | 148 | 22 |
| Eibe Langerak | LAD | 2057 | 24 | 155.2 | 173 | 151 | 22 |
| Connie Marrero | SF | 2043 | 30 | 205.2 | 99 | 77 | 22 |
| Jim Palmer | PHI | 2049 | 31 | 260.0 | 124 | 102 | 22 |
| Doc Newton | TB | 2055 | 30 | 190.1 | 110 | 89 | 21 |
| Hyun-jin Ryu | BOS | 2049 | 28 | 198.0 | 147 | 126 | 21 |
| Jimmy Key | DET | 2053 | 32 | 113.0 | 93 | 72 | 21 |