| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Chesbro | NYA | 6.38 | 190409202_NYA_MIN |
| Eddie Plank | OAK | 3.43 | 190409190_OAK_BOS |
| Cy Young | BOS | 2.52 | 190409200_OAK_BOS |
| Harry Howell | BAL | 1.51 | 190409201_CLE_BAL |
| Bill Bernhard | CLE | 1.37 | 190409191_CLE_BAL |
| 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 | -2.34 | 190409201_PIT_LAN |
| Jesse Stovall | DET | -0.9 | 190409210_DET_CHA |
Based on accumulated WAA for this season up to 1904-09-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.81 | Jack Chesbro | 392.7 | NYA |
| +002+ | 13.12 | Rube Waddell | 352.7 | OAK |
| +003+ | 10.33 | Eddie Plank | 335.3 | OAK |
| +004+ | 10.21 | Joe McGinnity | 376.3 | SFN |
| +005+ | 10.06 | Frank Owen | 315 | CHA |
| +006+ | 8.92 | Cy Young | 330 | BOS |
| +008+ | 7.8 | Jesse Tannehill | 281.7 | BOS |
| +009+ | 7.04 | Harry Howell | 273.7 | BAL |
| +010+ | 6.78 | Bill Bernhard | 290.7 | CLE |
| +011+ | 6.48 | Bill Dinneen | 283.7 | BOS |
| +012+ | 6.47 | Doc White | 187 | CHA |
| +013+ | 6.19 | Addie Joss | 165.3 | CLE |
| +016+ | 5.9 | George Mullin | 335 | DET |
| +017+ | 5.69 | Ed Killian | 317.7 | DET |
| +018+ | 5.67 | Jack Powell | 340.7 | NYA |
| +021+ | 5.49 | Earl Moore | 227.3 | CLE |
| +022+ | 5.29 | Norwood Gibson | 240 | BOS |
| +026+ | 4.67 | Fred Glade | 261.7 | BAL |
| +035+ | 4.05 | Weldon Henley | 263.7 | OAK |
| +036+ | 4.01 | Otto Hess | 123.3 | CLE |
| +037+ | 3.97 | Kid Nichols | 283 | SLN |
| +040+ | 3.79 | Patsy Flaherty | 262 | TOT |
| +043+ | 3.62 | Jake Weimer | 271.7 | CHN |
| +044+ | 3.51 | Bill Donovan | 279 | DET |
| +055+ | 2.5 | George Winter | 125 | BOS |
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