| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe McGinnity | SFN | 10.35 | 190406180_LAN_SFN |
| Bill Dinneen | BOS | 3.96 | 190406180_BOS_CHA |
| Jack Taylor | SLN | 2.53 | 190406191_PIT_SLN |
| Sam Leever | PIT | 2.14 | 190406191_PIT_SLN |
| Bill Donovan | DET | 1.58 | 190406180_OAK_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| John McPherson | PHI | -2.29 | 190406180_PHI_ATL |
| Happy Townsend | MIN | -1.34 | 190406180_MIN_CLE |
| Bill Reidy | LAN | -1.31 | 190406200_LAN_SFN |
| Jack Harper | CIN | -1.14 | 190406200_CHN_CIN |
| Joe Corbett | SLN | -0.98 | 190406180_SLN_PIT |
Based on accumulated WAA for this season up to 1904-06-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.82 | Rube Waddell | 150 | OAK |
| +002+ | 7.49 | Joe McGinnity | 165 | SFN |
| +003+ | 5.48 | Jack Chesbro | 155 | NYA |
| +004+ | 5.47 | Red Donahue | 100 | CLE |
| +005+ | 5.42 | Cy Young | 118 | BOS |
| +006+ | 4.87 | Jesse Tannehill | 113.7 | BOS |
| +007+ | 4.6 | Frank Owen | 127.7 | CHA |
| +008+ | 3.9 | Bill Dinneen | 122.7 | BOS |
| +015+ | 2.91 | Harry Howell | 106.7 | BAL |
| +016+ | 2.9 | Eddie Plank | 136 | OAK |
| +019+ | 2.56 | Weldon Henley | 108.7 | OAK |
| +020+ | 2.53 | Bill Bernhard | 115 | CLE |
| +021+ | 2.41 | Ed Killian | 136.3 | DET |
| +024+ | 2.23 | Barney Pelty | 86.3 | BAL |
| +026+ | 2.16 | Jack Taylor | 119 | SLN |
| +027+ | 2.15 | Patsy Flaherty | 78 | TOT |
| +028+ | 2.05 | Fred Glade | 86.7 | BAL |
| +031+ | 1.85 | Jack Powell | 120.7 | NYA |
| +034+ | 1.71 | Sam Leever | 97 | PIT |
| +039+ | 1.57 | George Mullin | 148 | DET |
| +043+ | 1.4 | Nick Altrock | 111.3 | CHA |
| +045+ | 1.33 | Norwood Gibson | 72 | BOS |
| +049+ | 1.29 | Ed Siever | 85 | BAL |
| +051+ | 1.28 | George Winter | 42.3 | BOS |
| XXXXX | 1.24 | Bill Donovan | 120 | DET |
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