| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe McGinnity | SFN | 4.59 | 190408080_SLN_SFN |
| Cy Young | BOS | 3.61 | 190408090_BOS_DET |
| Jack Chesbro | NYA | 3.43 | 190408100_NYA_CHA |
| Eddie Plank | OAK | 2.98 | 190408080_OAK_CHA |
| Frank Owen | CHA | 2.87 | 190408080_OAK_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tully Sparks | PHI | -3.22 | 190408080_PIT_PHI |
| Vic Willis | ATL | -2.24 | 190408080_CIN_ATL |
| Happy Townsend | MIN | -1.62 | 190408100_MIN_DET |
| Jack Harper | CIN | -0.56 | 190408080_CIN_ATL |
| Buttons Briggs | CHN | -0.41 | 190408080_CHN_LAN |
Based on accumulated WAA for this season up to 1904-08-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.76 | Rube Waddell | 252.3 | OAK |
| +002+ | 9.13 | Jack Chesbro | 278 | NYA |
| +003+ | 8.7 | Joe McGinnity | 274.3 | SFN |
| +004+ | 8.6 | Frank Owen | 242 | CHA |
| +005+ | 7.54 | Cy Young | 238.3 | BOS |
| +006+ | 7.43 | Eddie Plank | 243 | OAK |
| +008+ | 5.91 | Ed Killian | 231.3 | DET |
| +010+ | 5.13 | Jesse Tannehill | 184.7 | BOS |
| +011+ | 5.03 | Patsy Flaherty | 185 | TOT |
| +012+ | 4.92 | Frank Smith | 115.7 | CHA |
| +013+ | 4.86 | Earl Moore | 192.3 | CLE |
| +014+ | 4.7 | Red Donahue | 170 | CLE |
| +016+ | 4.4 | Harry Howell | 180 | BAL |
| +017+ | 4.39 | Bill Dinneen | 180.7 | BOS |
| +018+ | 4.32 | George Mullin | 252 | DET |
| +024+ | 3.73 | Nick Altrock | 205 | CHA |
| +026+ | 3.64 | Fred Glade | 173 | BAL |
| +028+ | 3.48 | Bill Bernhard | 196 | CLE |
| +029+ | 3.43 | Jack Powell | 230.7 | NYA |
| +035+ | 3 | Kid Nichols | 176 | SLN |
| +037+ | 2.74 | Jack Taylor | 226.3 | SLN |
| +040+ | 2.56 | Bill Donovan | 198 | DET |
| +041+ | 2.56 | Norwood Gibson | 163 | BOS |
| +042+ | 2.54 | Weldon Henley | 167.7 | OAK |
| +044+ | 2.51 | Addie Joss | 94.7 | CLE |
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