| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cy Young | BOS | 4.43 | 190308210_BOS_CHA |
| Earl Moore | CLE | 4.12 | 190308190_MIN_CLE |
| Bill Donovan | DET | 3.94 | 190308211_OAK_DET |
| Doc White | CHA | 3.87 | 190308190_BOS_CHA |
| Rube Waddell | OAK | 3.67 | 190308211_OAK_DET |
| 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 |
| Bob Rhoads | SLN | -1.72 | 190308212_SLN_PHI |
| Ed Poole | CIN | -1.18 | 190308212_CIN_ATL |
Based on accumulated WAA for this season up to 1903-08-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.91 | Earl Moore | 221.7 | CLE |
| +002+ | 11.17 | Cy Young | 266.7 | BOS |
| +003+ | 10.9 | Willie Sudhoff | 221.7 | BAL |
| +004+ | 10.77 | Rube Waddell | 324 | OAK |
| +005+ | 10.76 | Bill Donovan | 236 | DET |
| +006+ | 10.19 | Addie Joss | 265.7 | CLE |
| +007+ | 10.04 | Doc White | 239.7 | CHA |
| +008+ | 8.55 | George Mullin | 244 | DET |
| +009+ | 8.32 | Eddie Plank | 245.7 | OAK |
| +010+ | 7.75 | Bill Dinneen | 221.7 | BOS |
| +012+ | 6.61 | Frank Kitson | 192.7 | DET |
| +014+ | 6.27 | Chief Bender | 211.3 | OAK |
| +017+ | 5.45 | Jack Chesbro | 257.3 | NYA |
| +019+ | 5.38 | Red Donahue | 187 | TOT |
| +020+ | 5.1 | Ed Siever | 174 | BAL |
| +021+ | 5.08 | Tom Hughes | 168.7 | BOS |
| +022+ | 4.8 | Barney Wolfe | 107.3 | NYA |
| +024+ | 4.54 | Clark Griffith | 177 | NYA |
| +025+ | 4.45 | Roy Patterson | 209.7 | CHA |
| +027+ | 4.14 | Sam Leever | 220 | PIT |
| +028+ | 4.13 | Christy Mathewson | 289.3 | SFN |
| +032+ | 3.79 | Watty Lee | 104.7 | MIN |
| +043+ | 2.95 | Jack Powell | 224.3 | BAL |
| +046+ | 2.73 | Noodles Hahn | 220.7 | CIN |
| +054+ | 2.12 | Highball Wilson | 188.3 | MIN |
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