| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe McGinnity | SFN | 11.17 | 190405210_SFN_CHN |
| Bill Dinneen | BOS | 5.02 | 190405200_BAL_BOS |
| Doc White | CHA | 4.03 | 190405200_CHA_NYA |
| Jack Taylor | SLN | 3.17 | 190405190_PHI_SLN |
| Sam Leever | PIT | 2.61 | 190405200_ATL_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tully Sparks | PHI | -2.88 | 190405210_PHI_CIN |
| Jack Harper | CIN | -2.6 | 190405200_PHI_CIN |
| Watty Lee | PIT | -1.06 | 190405210_ATL_PIT |
| Ed Poole | LAN | -1.01 | 190405190_LAN_CHN |
| Jesse Stovall | DET | -0.9 | 190405200_DET_MIN |
Based on accumulated WAA for this season up to 1904-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.22 | Joe McGinnity | 87 | SFN |
| +002+ | 4.35 | Rube Waddell | 85 | OAK |
| +003+ | 3.6 | Red Donahue | 53 | CLE |
| +004+ | 3.53 | Jesse Tannehill | 60.7 | BOS |
| +005+ | 3.26 | Cy Young | 65 | BOS |
| +006+ | 2.82 | Frank Owen | 80 | CHA |
| +007+ | 2.55 | Bill Dinneen | 59 | BOS |
| +008+ | 2.45 | Norwood Gibson | 45 | BOS |
| +010+ | 2.4 | Jack Chesbro | 92 | NYA |
| +015+ | 2.24 | Ed Killian | 78.3 | DET |
| +017+ | 1.89 | Eddie Plank | 78 | OAK |
| +022+ | 1.74 | Harry Howell | 53.3 | BAL |
| +023+ | 1.52 | Bill Bernhard | 70 | CLE |
| XXXXX | 1.24 | Weldon Henley | 67.3 | OAK |
| XXXXX | 1.21 | Casey Patten | 76.7 | MIN |
| XXXXX | 1.18 | Fred Glade | 37.7 | BAL |
| XXXXX | 0.92 | Chappie McFarland | 44 | SLN |
| XXXXX | 0.92 | Kaiser Wilhelm | 53 | ATL |
| XXXXX | 0.9 | George Mullin | 92 | DET |
| XXXXX | 0.89 | Ed Walsh | 21 | CHA |
| XXXXX | 0.78 | Jake Weimer | 58.3 | CHN |
| XXXXX | 0.67 | Jack Powell | 73.7 | NYA |
| XXXXX | 0.63 | Jack Cronin | 71 | LAN |
| XXXXX | 0.61 | Chief Bender | 18 | OAK |
| XXXXX | 0.61 | Jack Taylor | 62 | SLN |
_