Research & Reports
Team Records
Washington Nats : ERA
| Team | Season | ERA |
| Washington Nats | 116 | 4.145 |
| Washington Nats | 134 | 4.221 |
| Washington Nats | 137 | 4.278 |
| Washington Nats | 130 | 4.390 |
| Washington Nats | 128 | 4.401 |
| Washington Nats | 110 | 4.488 |
| Washington Nats | 139 | 4.491 |
| Washington Nats | 112 | 4.534 |
| Washington Nats | 147 | 4.551 |
| Washington Nats | 114 | 4.618 |
| Washington Nats | 127 | 4.854 |
| Washington Nats | 142 | 4.880 |
| Washington Nats | 125 | 4.944 |
| Washington Nats | 138 | 5.009 |
| Washington Nats | 145 | 5.034 |
| Washington Nats | 143 | 5.038 |
| Washington Nats | 117 | 5.177 |
| Washington Nats | 113 | 5.230 |
| Washington Nats | 144 | 5.420 |
| Washington Nats | 129 | 5.470 |
| Washington Nats | 126 | 5.518 |
| Washington Nats | 118 | 5.699 |
| Washington Nats | 146 | 5.815 |
| Washington Nats | 115 | 6.177 |
| Washington Nats | 111 | 6.861 |
| Washington Nats | 119 | 6.895 |
