| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Chesbro | NYA | 5.71 | 190409161_NYA_BOS |
| Rube Waddell | OAK | 5.67 | 190409152_MIN_OAK |
| Frank Owen | CHA | 3.34 | 190409141_CLE_CHA |
| Joe McGinnity | SFN | 3.32 | 190409162_LAN_SFN |
| Cy Young | BOS | 2.24 | 190409162_NYA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Oscar Jones | LAN | -2.1 | 190409161_LAN_SFN |
| Ed McNichol | ATL | -1.05 | 190409150_ATL_SFN |
| Jesse Stovall | DET | -0.98 | 190409161_DET_CLE |
| Willie Sudhoff | BAL | -0.77 | 190409141_DET_BAL |
| Ralph Caldwell | PHI | -0.54 | 190409152_PHI_LAN |
Based on accumulated WAA for this season up to 1904-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.31 | Jack Chesbro | 384.7 | NYA |
| +002+ | 13.2 | Rube Waddell | 352.7 | OAK |
| +003+ | 10.29 | Joe McGinnity | 376.3 | SFN |
| +004+ | 10.22 | Frank Owen | 315 | CHA |
| +005+ | 9.91 | Eddie Plank | 326 | OAK |
| +006+ | 8.58 | Cy Young | 321 | BOS |
| +007+ | 8.27 | Jesse Tannehill | 272.7 | BOS |
| +009+ | 6.32 | Bill Bernhard | 276 | CLE |
| +010+ | 6.11 | Bill Dinneen | 274.7 | BOS |
| +011+ | 6.08 | Addie Joss | 159.3 | CLE |
| +012+ | 6.07 | Harry Howell | 255.7 | BAL |
| +015+ | 5.87 | Doc White | 178 | CHA |
| +016+ | 5.7 | Red Donahue | 241 | CLE |
| +017+ | 5.68 | George Mullin | 330 | DET |
| +018+ | 5.54 | Fred Glade | 248.7 | BAL |
| +019+ | 5.49 | Jack Powell | 331.7 | NYA |
| +020+ | 5.46 | Earl Moore | 224.3 | CLE |
| +021+ | 5.24 | Ed Killian | 309.7 | DET |
| +026+ | 4.85 | Norwood Gibson | 222 | BOS |
| +027+ | 4.69 | Jake Weimer | 263.7 | CHN |
| +028+ | 4.55 | Weldon Henley | 255.7 | OAK |
| +032+ | 4.32 | Frank Smith | 174.3 | CHA |
| +035+ | 4.08 | Kid Nichols | 283 | SLN |
| +037+ | 4.02 | Bill Donovan | 270 | DET |
| +042+ | 3.63 | Patsy Flaherty | 255 | TOT |
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