| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe McGinnity | SFN | 2.97 | 190409221_CIN_SFN |
| Cy Young | BOS | 2.43 | 190409230_BOS_DET |
| Bill Bernhard | CLE | 1.56 | 190409230_NYA_CLE |
| Jack Powell | NYA | 1.08 | 190409230_NYA_CLE |
| George Mullin | DET | 0.92 | 190409230_BOS_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Fisher | ATL | -7.26 | 190409210_SLN_ATL |
| Bill Duggleby | PHI | -6.1 | 190409211_CHN_PHI |
| Chappie McFarland | SLN | -2.82 | 190409210_SLN_ATL |
| Oscar Jones | LAN | -1.91 | 190409230_CHN_LAN |
| Jesse Stovall | DET | -0.9 | 190409210_DET_CHA |
Based on accumulated WAA for this season up to 1904-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.57 | Jack Chesbro | 392.7 | NYA |
| +002+ | 13.1 | Rube Waddell | 352.7 | OAK |
| +003+ | 10.32 | Eddie Plank | 335.3 | OAK |
| +004+ | 10.05 | Frank Owen | 315 | CHA |
| +005+ | 9.88 | Joe McGinnity | 385.3 | SFN |
| +006+ | 8.96 | Cy Young | 339 | BOS |
| +008+ | 7.79 | Jesse Tannehill | 281.7 | BOS |
| +009+ | 7.29 | Bill Bernhard | 299.7 | CLE |
| +010+ | 7.03 | Harry Howell | 273.7 | BAL |
| +011+ | 6.47 | Bill Dinneen | 283.7 | BOS |
| +012+ | 6.46 | Doc White | 187 | CHA |
| +014+ | 6.14 | Jack Powell | 349.7 | NYA |
| +015+ | 6.09 | Addie Joss | 165.3 | CLE |
| +018+ | 5.71 | George Mullin | 341 | DET |
| +019+ | 5.69 | Ed Killian | 317.7 | DET |
| +021+ | 5.35 | Earl Moore | 227.3 | CLE |
| +022+ | 5.28 | Norwood Gibson | 240 | BOS |
| +026+ | 4.66 | Fred Glade | 261.7 | BAL |
| +036+ | 4.04 | Weldon Henley | 263.7 | OAK |
| +037+ | 3.98 | Kid Nichols | 291 | SLN |
| +038+ | 3.94 | Otto Hess | 123.3 | CLE |
| +041+ | 3.83 | Patsy Flaherty | 262 | TOT |
| +043+ | 3.66 | Jake Weimer | 279.7 | CHN |
| +044+ | 3.5 | Bill Donovan | 279 | DET |
| +055+ | 2.49 | George Winter | 125 | BOS |
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