| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 9.54 | 190406250_MIN_OAK |
| Cy Young | BOS | 5.94 | 190406250_NYA_BOS |
| Jack Chesbro | NYA | 2.51 | 190406250_NYA_BOS |
| Jack Taylor | SLN | 2.5 | 190406260_SLN_CIN |
| Red Donahue | CLE | 1.91 | 190406250_CLE_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Fisher | ATL | -4.27 | 190406260_ATL_LAN |
| Joe Corbett | SLN | -2.85 | 190406250_SLN_CIN |
| John McPherson | PHI | -2.28 | 190406250_PHI_SFN |
| Happy Townsend | MIN | -1.73 | 190406250_MIN_OAK |
| Jack Harper | CIN | -0.9 | 190406250_SLN_CIN |
Based on accumulated WAA for this season up to 1904-06-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.48 | Joe McGinnity | 187 | SFN |
| +002+ | 7.35 | Rube Waddell | 161 | OAK |
| +003+ | 6.4 | Jack Chesbro | 173 | NYA |
| +004+ | 5.67 | Red Donahue | 116.3 | CLE |
| +005+ | 5.01 | Frank Owen | 144.7 | CHA |
| +006+ | 4.9 | Cy Young | 136 | BOS |
| +007+ | 4.25 | Jesse Tannehill | 122.7 | BOS |
| +010+ | 3.52 | Eddie Plank | 145 | OAK |
| +011+ | 3.51 | Harry Howell | 115.7 | BAL |
| +015+ | 3 | Bill Dinneen | 130.7 | BOS |
| +018+ | 2.88 | Bill Bernhard | 123 | CLE |
| +019+ | 2.87 | Ed Killian | 156 | DET |
| +020+ | 2.77 | George Mullin | 166 | DET |
| +022+ | 2.74 | Weldon Henley | 117.7 | OAK |
| +021+ | 2.74 | Patsy Flaherty | 87 | TOT |
| +024+ | 2.62 | Fred Glade | 95.7 | BAL |
| +025+ | 2.57 | Jack Taylor | 138 | SLN |
| +032+ | 2.18 | Barney Pelty | 95.3 | BAL |
| +033+ | 2.12 | Jack Powell | 138.7 | NYA |
| +039+ | 1.67 | Nick Altrock | 129.3 | CHA |
| +043+ | 1.53 | Earl Moore | 99.7 | CLE |
| +046+ | 1.44 | Sam Leever | 108 | PIT |
| +049+ | 1.37 | Jake Weimer | 119.7 | CHN |
| +050+ | 1.36 | Chief Bender | 60 | OAK |
| +052+ | 1.32 | George Winter | 42.3 | BOS |
_