| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 6.62 | 190409092_NYA_OAK |
| Jack Chesbro | NYA | 5.67 | 190409081_NYA_OAK |
| Frank Owen | CHA | 3.42 | 190409082_CHA_CLE |
| Joe McGinnity | SFN | 3.37 | 190409091_PHI_SFN |
| Cy Young | BOS | 2.46 | 190409071_BOS_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Duggleby | PHI | -6.56 | 190409081_PHI_SFN |
| Vic Willis | ATL | -4.42 | 190409070_LAN_ATL |
| Oscar Jones | LAN | -1.37 | 190409082_LAN_ATL |
| Jesse Stovall | DET | -1.28 | 190409082_BAL_DET |
| Happy Townsend | MIN | -0.57 | 190409081_BOS_MIN |
Based on accumulated WAA for this season up to 1904-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.54 | Rube Waddell | 347.7 | OAK |
| +002+ | 12.52 | Jack Chesbro | 357.7 | NYA |
| +003+ | 9.83 | Frank Owen | 306 | CHA |
| +004+ | 9.78 | Joe McGinnity | 358.3 | SFN |
| +005+ | 9.13 | Eddie Plank | 304 | OAK |
| +006+ | 7.91 | Jesse Tannehill | 256.7 | BOS |
| +007+ | 7.85 | Cy Young | 299.3 | BOS |
| +009+ | 6.47 | Bill Dinneen | 251.7 | BOS |
| +010+ | 6.13 | Bill Bernhard | 261 | CLE |
| +011+ | 6.05 | Harry Howell | 249.7 | BAL |
| +012+ | 5.83 | Red Donahue | 233 | CLE |
| +013+ | 5.64 | Frank Smith | 166.3 | CHA |
| +018+ | 5.29 | Fred Glade | 239.7 | BAL |
| +019+ | 5.23 | Jack Powell | 317.7 | NYA |
| +020+ | 5.04 | Addie Joss | 142.3 | CLE |
| +023+ | 4.89 | Kid Nichols | 265 | SLN |
| +024+ | 4.88 | Ed Killian | 292.7 | DET |
| +025+ | 4.84 | George Mullin | 315 | DET |
| +026+ | 4.77 | Norwood Gibson | 208 | BOS |
| +030+ | 4.51 | Jake Weimer | 246.7 | CHN |
| +029+ | 4.51 | Doc White | 160 | CHA |
| +032+ | 4.19 | Bill Donovan | 260.3 | DET |
| +036+ | 3.96 | Weldon Henley | 239.7 | OAK |
| +039+ | 3.75 | Otto Hess | 96.3 | CLE |
| +043+ | 3.36 | Patsy Flaherty | 246 | TOT |
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