| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cy Young | BOS | 6.74 | 190305200_BOS_BAL |
| Rube Waddell | OAK | 6.64 | 190305190_OAK_BAL |
| Bill Donovan | DET | 4.44 | 190305180_BOS_DET |
| Doc White | CHA | 4.35 | 190305180_MIN_CHA |
| Sam Leever | PIT | 3.07 | 190305200_PIT_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Evans | LAN | -2.99 | 190305190_CIN_LAN |
| Fred Mitchell | PHI | -2.29 | 190305190_SLN_PHI |
| Ed Poole | CIN | -1.92 | 190305190_CIN_LAN |
| Mordecai Brown | SLN | -1.14 | 190305180_SLN_PHI |
| Gene Wright | CLE | -0.59 | 190305190_MIN_CLE |
Based on accumulated WAA for this season up to 1903-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.57 | Eddie Plank | 70 | OAK |
| +002+ | 3.34 | Addie Joss | 61 | CLE |
| +003+ | 3.02 | Bill Donovan | 53.7 | DET |
| +004+ | 3.01 | Rube Waddell | 75 | OAK |
| +005+ | 3 | Cy Young | 78.7 | BOS |
| +006+ | 2.8 | George Mullin | 62 | DET |
| +007+ | 2.51 | Roy Patterson | 53 | CHA |
| +008+ | 2.31 | Jack Chesbro | 62 | NYA |
| +011+ | 2.19 | Sam Leever | 55 | PIT |
| +012+ | 2.18 | Patsy Flaherty | 58.3 | CHA |
| +013+ | 2.05 | Jack Sutthoff | 50 | CIN |
| +014+ | 2.02 | Doc White | 50 | CHA |
| +015+ | 1.86 | Earl Moore | 44 | CLE |
| +017+ | 1.75 | Bill Dinneen | 57.7 | BOS |
| +018+ | 1.71 | Mal Eason | 38.3 | DET |
| +019+ | 1.69 | Chief Bender | 57.3 | OAK |
| +020+ | 1.65 | Jack Taylor | 81 | CHN |
| +021+ | 1.64 | Ed Siever | 45 | BAL |
| +022+ | 1.49 | Henry Schmidt | 70 | LAN |
| +024+ | 1.43 | Willie Sudhoff | 45 | BAL |
| +027+ | 1.37 | Joe McGinnity | 75.7 | SFN |
| XXXXX | 1.25 | Jesse Tannehill | 45.3 | NYA |
| XXXXX | 1.11 | Jack Powell | 46 | BAL |
| XXXXX | 1.04 | Bob Wicker | 53.3 | TOT |
| XXXXX | 0.85 | Red Donahue | 52 | BAL |
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