| Starter | Tm | Tier | Game |
|---|---|---|---|
| Doc White | CHA | 4.81 | 190307100_CHA_BOS |
| Bill Donovan | DET | 4.37 | 190307100_DET_MIN |
| Bill Dinneen | BOS | 3.81 | 190307090_CHA_BOS |
| Eddie Plank | OAK | 2.03 | 190307090_CLE_OAK |
| Sam Leever | PIT | 2 | 190307090_LAN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chick Fraser | PHI | -2.32 | 190307080_PHI_CHN |
| Wiley Piatt | ATL | -1.99 | 190307100_ATL_CIN |
| Henry Schmidt | LAN | -1.73 | 190307080_LAN_PIT |
| Mordecai Brown | SLN | -1.4 | 190307090_SFN_SLN |
| Jack Harper | CIN | -1.33 | 190307100_ATL_CIN |
Based on accumulated WAA for this season up to 1903-07-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.73 | Cy Young | 166.7 | BOS |
| +002+ | 7.41 | Rube Waddell | 204 | OAK |
| +003+ | 7.29 | Addie Joss | 164.3 | CLE |
| +004+ | 7.02 | Doc White | 161.3 | CHA |
| +005+ | 6.48 | Bill Donovan | 146.7 | DET |
| +006+ | 6.03 | Bill Dinneen | 152.7 | BOS |
| +007+ | 5.63 | Earl Moore | 129.7 | CLE |
| +008+ | 5.39 | George Mullin | 153 | DET |
| +009+ | 5.13 | Willie Sudhoff | 131 | BAL |
| +010+ | 5.04 | Jack Chesbro | 167.3 | NYA |
| +011+ | 4.73 | Eddie Plank | 153.7 | OAK |
| +013+ | 4.55 | Bill Bernhard | 136.3 | CLE |
| +014+ | 4.51 | Sam Leever | 140 | PIT |
| +016+ | 4 | Barney Wolfe | 87.3 | NYA |
| +018+ | 3.88 | Chief Bender | 144.3 | OAK |
| +020+ | 3.66 | Red Donahue | 131 | BAL |
| +021+ | 3.33 | Tom Hughes | 102.7 | BOS |
| +023+ | 3.27 | Christy Mathewson | 178 | SFN |
| +024+ | 3.01 | Joe McGinnity | 215.7 | SFN |
| +028+ | 2.64 | Jesse Tannehill | 133.3 | NYA |
| +029+ | 2.57 | Ed Siever | 96.3 | BAL |
| +033+ | 2.43 | Frank Kitson | 114.3 | DET |
| +042+ | 2.05 | Noodles Hahn | 129.7 | CIN |
| +047+ | 1.76 | Highball Wilson | 116.3 | MIN |
| +051+ | 1.67 | Clark Griffith | 110.7 | NYA |
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