| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 8 | 190408290_CHA_OAK |
| Joe McGinnity | SFN | 5.26 | 190408311_SFN_CIN |
| Jack Chesbro | NYA | 4.98 | 190408310_CLE_NYA |
| Frank Owen | CHA | 3.69 | 190408310_CHA_OAK |
| Cy Young | BOS | 3.16 | 190408300_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Willis | ATL | -3.84 | 190408300_ATL_PIT |
| Chick Fraser | PHI | -3.32 | 190408310_PHI_SLN |
| Oscar Jones | LAN | -2.02 | 190408300_LAN_CHN |
| Happy Townsend | MIN | -0.6 | 190408301_BAL_MIN |
| Bob Ewing | CIN | -0.6 | 190408312_SFN_CIN |
Based on accumulated WAA for this season up to 1904-08-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.13 | Rube Waddell | 312.3 | OAK |
| +002+ | 11.25 | Jack Chesbro | 330.7 | NYA |
| +003+ | 11.04 | Joe McGinnity | 339.3 | SFN |
| +004+ | 9.85 | Frank Owen | 293 | CHA |
| +005+ | 8.39 | Cy Young | 281.3 | BOS |
| +006+ | 8.36 | Eddie Plank | 286 | OAK |
| +008+ | 6.66 | Jesse Tannehill | 229.7 | BOS |
| +009+ | 6.09 | Ed Killian | 276.7 | DET |
| +010+ | 5.84 | Bill Dinneen | 224.7 | BOS |
| +012+ | 5.67 | Red Donahue | 207 | CLE |
| +013+ | 5.66 | Bill Bernhard | 244 | CLE |
| +014+ | 5.3 | Harry Howell | 224.7 | BAL |
| +017+ | 5.04 | Frank Smith | 141.3 | CHA |
| +021+ | 4.74 | Kid Nichols | 239 | SLN |
| +022+ | 4.73 | Jack Powell | 284.7 | NYA |
| +025+ | 4.41 | Patsy Flaherty | 229 | TOT |
| +026+ | 4.03 | Bill Donovan | 234.3 | DET |
| +027+ | 4.02 | George Mullin | 297 | DET |
| +028+ | 4.01 | Jake Weimer | 229.7 | CHN |
| +029+ | 3.96 | Addie Joss | 124.3 | CLE |
| +033+ | 3.84 | Doc White | 142 | CHA |
| +035+ | 3.75 | Fred Glade | 212.7 | BAL |
| +036+ | 3.68 | Norwood Gibson | 181 | BOS |
| +039+ | 3.37 | Weldon Henley | 213.7 | OAK |
| +046+ | 2.89 | Nick Altrock | 234 | CHA |
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