| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe McGinnity | SFN | 9.68 | 190406290_ATL_SFN |
| Rube Waddell | OAK | 9.24 | 190406300_OAK_BOS |
| Cy Young | BOS | 5.49 | 190406300_OAK_BOS |
| Jack Taylor | SLN | 2.04 | 190406300_CHN_SLN |
| Frank Owen | CHA | 1.44 | 190406280_CHA_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Duggleby | PHI | -3.49 | 190406290_LAN_PHI |
| Oscar Jones | LAN | -1.23 | 190406280_ATL_LAN |
| Vic Willis | ATL | -0.52 | 190406290_ATL_SFN |
| War Sanders | SLN | -0.16 | 190406290_CHN_SLN |
| Noodles Hahn | CIN | -0.05 | 190406280_SLN_CIN |
Based on accumulated WAA for this season up to 1904-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.03 | Joe McGinnity | 196 | SFN |
| +002+ | 7.68 | Rube Waddell | 169.3 | OAK |
| +003+ | 6.45 | Jack Chesbro | 173 | NYA |
| +004+ | 5.68 | Red Donahue | 116.3 | CLE |
| +005+ | 5.55 | Frank Owen | 153.7 | CHA |
| +006+ | 5.02 | Cy Young | 145 | BOS |
| +007+ | 4.27 | Jesse Tannehill | 122.7 | BOS |
| +009+ | 4.02 | Eddie Plank | 153 | OAK |
| +011+ | 3.54 | Harry Howell | 115.7 | BAL |
| +017+ | 3.05 | George Mullin | 175 | DET |
| +018+ | 3.02 | Bill Dinneen | 130.7 | BOS |
| +019+ | 2.91 | Ed Killian | 156 | DET |
| +020+ | 2.88 | Bill Bernhard | 123 | CLE |
| +021+ | 2.78 | Weldon Henley | 117.7 | OAK |
| +023+ | 2.65 | Fred Glade | 95.7 | BAL |
| +025+ | 2.45 | Patsy Flaherty | 96 | TOT |
| +029+ | 2.25 | Jack Taylor | 147 | SLN |
| +031+ | 2.16 | Jack Powell | 138.7 | NYA |
| +033+ | 2.05 | Barney Pelty | 104.3 | BAL |
| +035+ | 1.9 | Jake Weimer | 128.7 | CHN |
| +041+ | 1.75 | Norwood Gibson | 89 | BOS |
| +042+ | 1.68 | Nick Altrock | 129.3 | CHA |
| +045+ | 1.53 | Earl Moore | 99.7 | CLE |
| +047+ | 1.49 | Casey Patten | 154 | MIN |
| +048+ | 1.45 | Sam Leever | 108 | PIT |
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