| 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 |
|---|---|---|---|
| Fred Mitchell | PHI | -4.03 | 190308200_SLN_PHI |
| Togie Pittinger | ATL | -3.88 | 190308192_CIN_ATL |
| Henry Schmidt | LAN | -3.49 | 190308191_CHN_LAN |
| Mordecai Brown | SLN | -1.27 | 190308180_SLN_LAN |
| Dummy Taylor | SFN | -1.05 | 190308202_PIT_SFN |
Based on accumulated WAA for this season up to 1903-08-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.88 | Earl Moore | 221.7 | CLE |
| +002+ | 10.87 | Willie Sudhoff | 221.7 | BAL |
| +003+ | 10.52 | Cy Young | 257.7 | BOS |
| +004+ | 10.15 | Addie Joss | 265.7 | CLE |
| +005+ | 10.12 | Bill Donovan | 227 | DET |
| +006+ | 9.99 | Doc White | 239.7 | CHA |
| +007+ | 9.58 | Rube Waddell | 307 | OAK |
| +008+ | 8.42 | George Mullin | 243 | DET |
| +009+ | 8.25 | Eddie Plank | 245.7 | OAK |
| +010+ | 7.71 | Bill Dinneen | 221.7 | BOS |
| +012+ | 6.58 | Frank Kitson | 192.7 | DET |
| +013+ | 6.21 | Chief Bender | 211.3 | OAK |
| +017+ | 5.72 | Jack Chesbro | 249.3 | NYA |
| +018+ | 5.51 | Roy Patterson | 200.7 | CHA |
| +020+ | 5.07 | Ed Siever | 174 | BAL |
| +021+ | 5.06 | Tom Hughes | 168.7 | BOS |
| +022+ | 4.77 | Barney Wolfe | 107.3 | NYA |
| +023+ | 4.54 | Red Donahue | 178 | TOT |
| +024+ | 4.49 | Clark Griffith | 177 | NYA |
| +025+ | 4.33 | Christy Mathewson | 280.3 | SFN |
| +032+ | 3.76 | Watty Lee | 104.7 | MIN |
| +037+ | 3.27 | Sam Leever | 211 | PIT |
| +044+ | 2.92 | Jack Powell | 224.3 | BAL |
| +045+ | 2.82 | Highball Wilson | 187.3 | MIN |
| +048+ | 2.67 | Noodles Hahn | 220.7 | CIN |
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