List of Arizona Diamondbacks pitching with the lowest earned run average
| Rank | Player Name | ERA |
| 1 | Randy Johnson | 2.652 |
| 2 | Curt Schilling | 3.148 |
| 3 | Brandon Webb | 3.284 |
| 4 | Miguel Batista | 3.999 |
| 5 | Brian Anderson | 4.520 |
| Rank | Player Name | ERA |
| 1 | Randy Johnson | 2.652 |
| 2 | Curt Schilling | 3.148 |
| 3 | Brandon Webb | 3.284 |
| 4 | Miguel Batista | 3.999 |
| 5 | Brian Anderson | 4.520 |
