| MLB Pitching Leaders - 1878 - Earned Run Average | |||||||||||||||
| PLAYER | YRS | G | GS | CG | SH | IP | H | ER | BB | SO | W | L | SV | ERA | |
| 1 | John Ward | 17 | 37 | 37 | 37 | 6 | 334.0 | 308 | 56 | 34 | 116 | 22 | 13 | 0 | 1.51 |
| 2 | Will White | 10 | 52 | 52 | 52 | 5 | 468.0 | 477 | 93 | 45 | 169 | 30 | 21 | 0 | 1.79 |
| 3 | Sam Weaver | 5 | 45 | 43 | 39 | 1 | 383.0 | 371 | 83 | 21 | 95 | 12 | 31 | 0 | 1.95 |
| 4 | Tommy Bond | 8 | 59 | 59 | 57 | 9 | 532.2 | 571 | 122 | 33 | 182 | 40 | 19 | 0 | 2.06 |
| 5 | Terry Larkin | 6 | 56 | 56 | 56 | 1 | 506.0 | 511 | 126 | 31 | 163 | 29 | 26 | 0 | 2.24 |
| 6 | The only Nolan | 5 | 38 | 38 | 37 | 1 | 347.0 | 357 | 99 | 56 | 125 | 13 | 22 | 0 | 2.57 |
| 7 | Mike Golden | 1 | 22 | 18 | 15 | 0 | 161.0 | 217 | 74 | 33 | 52 | 3 | 13 | 0 | 4.14 |