| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eddie Plank | OAK | 5.18 | 191304190_BOS_OAK |
| Vean Gregg | CLE | 4.7 | 191304200_CLE_CHA |
| Walter Johnson | MIN | 4.43 | 191304190_MIN_NYA |
| Ed Walsh | CHA | 3.73 | 191304200_CLE_CHA |
| Smoky Joe Wood | BOS | 3.23 | 191304210_BOS_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Tyler | ATL | -6.4 | 191304210_SFN_ATL |
| Ralph Works | CIN | -2.62 | 191304190_CIN_PIT |
| Roy Mitchell | BAL | -1.03 | 191304210_BAL_CLE |
| Bob Harmon | SLN | -0.73 | 191304200_PIT_SLN |
| Erskine Mayer | PHI | -0.72 | 191304210_PHI_LAN |
Based on accumulated WAA for this season up to 1913-04-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 1.53 | Vean Gregg | 27 | CLE |
| +002+ | 1.29 | Carl Weilman | 27 | BAL |
| +003+ | 1.26 | Tom Seaton | 18 | PHI |
| XXXXX | 1.09 | George Mullin | 27 | DET |
| XXXXX | 1.05 | Walter Johnson | 18 | MIN |
| XXXXX | 1.02 | Hub Perdue | 18 | ATL |
| XXXXX | 0.98 | Nap Rucker | 17 | LAN |
| XXXXX | 0.88 | Cy Falkenberg | 18 | CLE |
| XXXXX | 0.87 | Jean Dubuc | 18 | DET |
| XXXXX | 0.73 | Ray Keating | 16 | NYA |
| XXXXX | 0.71 | Slim Sallee | 15.7 | SLN |
| XXXXX | 0.7 | Pat Ragan | 19 | LAN |
| XXXXX | 0.69 | Larry Cheney | 28.7 | CHN |
| XXXXX | 0.67 | Jim Scott | 15 | CHA |
| XXXXX | 0.63 | Ad Brennan | 9 | PHI |
| XXXXX | 0.57 | Babe Adams | 27 | PIT |
| XXXXX | 0.54 | Red Ames | 17 | SFN |
| XXXXX | 0.52 | George McConnell | 16 | NYA |
| XXXXX | 0.46 | Erskine Mayer | 9.7 | PHI |
| XXXXX | 0.45 | Reb Russell | 12 | CHA |
| XXXXX | 0.44 | Willie Mitchell | 20.7 | CLE |
| XXXXX | 0.43 | Joe Lake | 9 | DET |
| XXXXX | 0.43 | Charlie Smith | 18.7 | CHN |
| XXXXX | 0.37 | Marc Hall | 11 | DET |
| XXXXX | 0.35 | Frank Allen | 17 | LAN |
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