| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cy Young | BOS | 6.1 | 190307180_DET_BOS |
| Addie Joss | CLE | 2.35 | 190307201_CLE_NYA |
| Eddie Plank | OAK | 1.72 | 190307200_BAL_OAK |
| Sam Leever | PIT | 1.69 | 190307200_PIT_CHN |
| George Mullin | DET | 1.43 | 190307180_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Togie Pittinger | ATL | -3.88 | 190307181_ATL_CHN |
| Fred Mitchell | PHI | -3.74 | 190307182_PHI_CIN |
| Mike O'Neill | SLN | -3.74 | 190307190_LAN_SLN |
| Ed Poole | CIN | -1.57 | 190307191_PHI_CIN |
| Ned Garvin | LAN | -1.1 | 190307180_LAN_SLN |
Based on accumulated WAA for this season up to 1903-07-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.77 | Cy Young | 193.7 | BOS |
| +002+ | 8.39 | Rube Waddell | 227 | OAK |
| +003+ | 7.67 | Bill Donovan | 164.7 | DET |
| +004+ | 7.39 | Doc White | 169.3 | CHA |
| +005+ | 7.13 | Addie Joss | 181.7 | CLE |
| +006+ | 6.74 | Bill Bernhard | 163.3 | CLE |
| +007+ | 6.68 | George Mullin | 179 | DET |
| +008+ | 6.65 | Earl Moore | 150.7 | CLE |
| +009+ | 6.35 | Bill Dinneen | 164.7 | BOS |
| +010+ | 5.48 | Eddie Plank | 171.7 | OAK |
| +011+ | 5.46 | Willie Sudhoff | 142.3 | BAL |
| +014+ | 4.71 | Jack Chesbro | 188.3 | NYA |
| +015+ | 4.42 | Sam Leever | 157 | PIT |
| +017+ | 4.18 | Barney Wolfe | 99.3 | NYA |
| +019+ | 3.82 | Chief Bender | 153.3 | OAK |
| +020+ | 3.77 | Roy Patterson | 128.3 | CHA |
| +021+ | 3.75 | Christy Mathewson | 194.3 | SFN |
| +023+ | 3.62 | Ed Siever | 115.3 | BAL |
| +024+ | 3.58 | Red Donahue | 131 | BAL |
| +025+ | 3.42 | Tom Hughes | 111.7 | BOS |
| +032+ | 2.59 | Highball Wilson | 136.3 | MIN |
| +034+ | 2.46 | Clark Griffith | 129.7 | NYA |
| +036+ | 2.4 | Frank Kitson | 123.7 | DET |
| +041+ | 2.23 | Deacon Phillippe | 167.7 | PIT |
| +042+ | 2.13 | Watty Lee | 81.7 | MIN |
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