| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cy Young | BOS | 4.44 | 190308180_BOS_CLE |
| Earl Moore | CLE | 4.12 | 190308190_MIN_CLE |
| Rube Waddell | OAK | 3.95 | 190308180_OAK_BAL |
| Bill Donovan | DET | 3.91 | 190308181_NYA_DET |
| Doc White | CHA | 3.87 | 190308190_BOS_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Togie Pittinger | ATL | -3.88 | 190308192_CIN_ATL |
| Henry Schmidt | LAN | -3.49 | 190308191_CHN_LAN |
| Mordecai Brown | SLN | -1.27 | 190308180_SLN_LAN |
| Ed Poole | CIN | -1.14 | 190308172_CIN_SFN |
| Gene Wright | BAL | -0.89 | 190308180_OAK_BAL |
Based on accumulated WAA for this season up to 1903-08-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.89 | Earl Moore | 221.7 | CLE |
| +002+ | 10.55 | Willie Sudhoff | 213.3 | BAL |
| +003+ | 10.52 | Cy Young | 257.7 | BOS |
| +004+ | 10.14 | Bill Donovan | 227 | DET |
| +005+ | 10.01 | Doc White | 239.7 | CHA |
| +006+ | 9.57 | Addie Joss | 256.7 | CLE |
| +007+ | 9.55 | Rube Waddell | 307 | OAK |
| +008+ | 8.45 | George Mullin | 243 | DET |
| +009+ | 8.32 | Eddie Plank | 237.3 | OAK |
| +010+ | 7.71 | Bill Dinneen | 221.7 | BOS |
| +012+ | 6.2 | Frank Kitson | 183.7 | DET |
| +013+ | 6.16 | Tom Hughes | 164.7 | BOS |
| +016+ | 5.71 | Jack Chesbro | 249.3 | NYA |
| +017+ | 5.69 | Chief Bender | 203.3 | OAK |
| +018+ | 5.52 | Roy Patterson | 200.7 | CHA |
| +021+ | 5.09 | Ed Siever | 174 | BAL |
| +022+ | 4.86 | Christy Mathewson | 274.3 | SFN |
| +023+ | 4.56 | Red Donahue | 178 | TOT |
| +029+ | 3.89 | Clark Griffith | 168 | NYA |
| +032+ | 3.76 | Watty Lee | 104.7 | MIN |
| +038+ | 3.27 | Sam Leever | 211 | PIT |
| +045+ | 2.81 | Highball Wilson | 187.3 | MIN |
| +047+ | 2.75 | Jack Powell | 215.3 | BAL |
| +049+ | 2.68 | Noodles Hahn | 220.7 | CIN |
| +058+ | 2.03 | Jesse Tannehill | 182.3 | NYA |
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