| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 9.7 | 190405020_OAK_BOS |
| Joe McGinnity | SFN | 7.37 | 190405040_SFN_ATL |
| Bill Dinneen | BOS | 4.53 | 190405030_OAK_BOS |
| Bill Donovan | DET | 3.9 | 190405020_CLE_DET |
| Ed Siever | BAL | 2.37 | 190405030_CHA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Johnny Lush | PHI | -2.03 | 190405040_LAN_PHI |
| Joe Corbett | SLN | -0.9 | 190405040_SLN_CIN |
| Doc Scanlan | PIT | -0.9 | 190405030_PIT_CHN |
| Jack Hickey | CLE | -0.72 | 190405040_CLE_DET |
| Ed Poole | LAN | -0.61 | 190405030_LAN_PHI |
Based on accumulated WAA for this season up to 1904-05-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.68 | Rube Waddell | 39 | OAK |
| +002+ | 2.27 | Togie Pittinger | 35 | ATL |
| +003+ | 2.17 | Joe McGinnity | 50 | SFN |
| +004+ | 2 | Norwood Gibson | 27 | BOS |
| +008+ | 1.58 | Jesse Tannehill | 27 | BOS |
| +009+ | 1.49 | Patsy Flaherty | 33 | CHA |
| +011+ | 1.47 | Red Donahue | 26 | CLE |
| +012+ | 1.4 | Bill Dinneen | 32 | BOS |
| +013+ | 1.4 | Cy Young | 32 | BOS |
| +014+ | 1.38 | Jack Powell | 38.7 | NYA |
| +015+ | 1.32 | Harry Howell | 19 | BAL |
| +016+ | 1.32 | Ed Killian | 50 | DET |
| XXXXX | 1.15 | Frank Owen | 44 | CHA |
| XXXXX | 1.1 | Bill Bernhard | 36 | CLE |
| XXXXX | 0.97 | Jack Cronin | 38 | LAN |
| XXXXX | 0.97 | Weldon Henley | 36 | OAK |
| XXXXX | 0.94 | Dummy Taylor | 34 | SFN |
| XXXXX | 0.9 | Barney Pelty | 34 | BAL |
| XXXXX | 0.85 | Bill Donovan | 37 | DET |
| XXXXX | 0.81 | Kaiser Wilhelm | 28 | ATL |
| XXXXX | 0.78 | George Winter | 11 | BOS |
| XXXXX | 0.78 | Jack Chesbro | 44 | NYA |
| XXXXX | 0.67 | Bob Rhoads | 17 | CLE |
| XXXXX | 0.63 | Fred Glade | 9 | BAL |
| XXXXX | 0.61 | Eddie Plank | 42 | OAK |
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