List of Baltimore Orioles pitchers with the most earned runs allowed
| Rank | Player Name | ERs |
| 1 | Jim Palmer | 1,253 |
| 2 | Mike Flanagan | 1,001 |
| 3 | Scott McGregor | 949 |
| 4 | Dave McNally | 937 |
| 5 | George Blaeholder | 824 |
| 6 | Dennis Martinez | 820 |
| 7 | Mike Mussina | 789 |
| 8 | Sidney Ponson | 743 |
| 9 | Elam Vangilder | 739 |
| 10 | Mike Cuellar | 716 |
| 11 | Scott Erickson | 677 |
| 12 | Jack Powell | 651 |
| 13 | Sam Gray | 637 |
| 14 | Urban Shocker | 620 |
| 15 | Milt Pappas | 587 |
| 16 | Lefty Stewart | 565 |
| 17 | Dixie Davis | 557 |
| 18 | Jack Kramer | 546 |
| 19 | Barney Pelty | 542 |
| 20 | Dick Coffman | 537 |
| 21 | Mike Boddicker | 528 |
| 22 | Jack Knott | 494 |
| 22 | Bob Muncrief | 494 |
| 24 | Steve Barber | 491 |
| 25 | Rodrigo Lopez | 479 |
