| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 8.45 | 190407190_BAL_OAK |
| Jack Chesbro | NYA | 3.63 | 190407190_DET_NYA |
| Frank Owen | CHA | 1.71 | 190407180_CHA_MIN |
| Bill Dinneen | BOS | 1.54 | 190407190_CLE_BOS |
| Bill Donovan | DET | 1.03 | 190407190_DET_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Duggleby | PHI | -5.84 | 190407170_PHI_CHN |
| Kaiser Wilhelm | ATL | -2.23 | 190407190_ATL_SLN |
| Joe Corbett | SLN | -1.83 | 190407190_ATL_SLN |
| Oscar Jones | LAN | -1.22 | 190407180_LAN_CIN |
| Jack Harper | CIN | -1.03 | 190407190_LAN_CIN |
Based on accumulated WAA for this season up to 1904-07-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.44 | Rube Waddell | 205.3 | OAK |
| +002+ | 8.34 | Jack Chesbro | 235 | NYA |
| +003+ | 7.65 | Joe McGinnity | 239 | SFN |
| +004+ | 7.2 | Cy Young | 190 | BOS |
| +005+ | 6.32 | Frank Owen | 187.7 | CHA |
| +006+ | 5.65 | Eddie Plank | 190 | OAK |
| +009+ | 4.65 | Red Donahue | 126 | CLE |
| +010+ | 4.48 | Jesse Tannehill | 148.7 | BOS |
| +011+ | 4.21 | Ed Killian | 188 | DET |
| +013+ | 3.89 | Patsy Flaherty | 141 | TOT |
| +016+ | 3.51 | Harry Howell | 143.7 | BAL |
| +017+ | 3.49 | Jack Taylor | 183 | SLN |
| +018+ | 3.45 | Norwood Gibson | 123 | BOS |
| +019+ | 3.36 | Bill Dinneen | 142.7 | BOS |
| +024+ | 3.21 | George Mullin | 208 | DET |
| +029+ | 3.02 | Fred Glade | 134.7 | BAL |
| +030+ | 2.81 | Ed Siever | 137.3 | BAL |
| +031+ | 2.68 | Earl Moore | 137.7 | CLE |
| +032+ | 2.65 | Bill Bernhard | 165 | CLE |
| +035+ | 2.61 | Weldon Henley | 145.7 | OAK |
| +036+ | 2.55 | Kid Nichols | 149 | SLN |
| +039+ | 2.44 | Doc White | 112 | CHA |
| +041+ | 2.38 | Frank Smith | 65 | CHA |
| +042+ | 2.34 | Bill Donovan | 171.7 | DET |
| +045+ | 2.16 | Jack Powell | 184.7 | NYA |
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