| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 6.87 | 190409052_OAK_NYA |
| Jack Chesbro | NYA | 5.76 | 190409051_OAK_NYA |
| Frank Owen | CHA | 3.55 | 190409032_CHA_MIN |
| Cy Young | BOS | 2.34 | 190409030_CLE_BOS |
| Harry Howell | BAL | 1.11 | 190409032_BAL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Willis | ATL | -4.01 | 190409030_ATL_SFN |
| Chick Fraser | PHI | -3.2 | 190409052_LAN_PHI |
| Oscar Jones | LAN | -1.76 | 190409052_LAN_PHI |
| Chappie McFarland | SLN | -1.43 | 190409040_SLN_CHN |
| Happy Townsend | MIN | -0.68 | 190409031_CHA_MIN |
Based on accumulated WAA for this season up to 1904-09-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.9 | Rube Waddell | 321.7 | OAK |
| +002+ | 12.12 | Jack Chesbro | 348.7 | NYA |
| +003+ | 10.89 | Joe McGinnity | 339.3 | SFN |
| +004+ | 9.64 | Frank Owen | 297 | CHA |
| +005+ | 8.52 | Eddie Plank | 295 | OAK |
| +007+ | 7.49 | Cy Young | 290.3 | BOS |
| +008+ | 6.61 | Jesse Tannehill | 238.7 | BOS |
| +009+ | 5.9 | Frank Smith | 158.3 | CHA |
| +010+ | 5.8 | Bill Dinneen | 233.7 | BOS |
| +011+ | 5.64 | Harry Howell | 232.7 | BAL |
| +013+ | 5.57 | Bill Bernhard | 252 | CLE |
| +016+ | 5.25 | Red Donahue | 224 | CLE |
| +018+ | 4.93 | Ed Killian | 283.7 | DET |
| +022+ | 4.7 | Jack Powell | 301.7 | NYA |
| +023+ | 4.65 | Fred Glade | 230.7 | BAL |
| +025+ | 4.53 | Kid Nichols | 256 | SLN |
| +026+ | 4.49 | Doc White | 151 | CHA |
| +027+ | 4.41 | Addie Joss | 133.3 | CLE |
| +028+ | 4.39 | Jake Weimer | 238.7 | CHN |
| +029+ | 4.26 | George Mullin | 306 | DET |
| +030+ | 4.16 | Norwood Gibson | 199 | BOS |
| +034+ | 3.81 | Bill Donovan | 251.3 | DET |
| +035+ | 3.78 | Patsy Flaherty | 238 | TOT |
| +040+ | 3.14 | Weldon Henley | 222.7 | OAK |
| +043+ | 3.1 | Otto Hess | 87.3 | CLE |
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