Research & Reports
Team Records
Chicago Rockies : ERA
| Team | Season | ERA |
| Chicago Rockies | 96 | 3.855 |
| Chicago Rockies | 95 | 4.043 |
| Chicago Rockies | 100 | 4.048 |
| Chicago Rockies | 99 | 4.368 |
| Chicago Rockies | 98 | 4.457 |
| Chicago Rockies | 93 | 4.577 |
| Chicago Rockies | 97 | 4.602 |
| Chicago Rockies | 92 | 4.628 |
| Chicago Rockies | 103 | 4.670 |
| Chicago Rockies | 106 | 4.679 |
| Chicago Rockies | 94 | 4.692 |
| Chicago Rockies | 105 | 4.921 |
| Chicago Rockies | 104 | 4.943 |
| Chicago Rockies | 101 | 5.417 |
| Chicago Rockies | 102 | 5.868 |
| Chicago Rockies | 107 | 6.344 |
