| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 10.36 | 190405050_OAK_BOS |
| Cy Young | BOS | 9.1 | 190405050_OAK_BOS |
| Doc White | CHA | 5.98 | 190405050_BAL_CHA |
| Sam Leever | PIT | 3.55 | 190405070_PHI_PIT |
| Ed Siever | BAL | 3.39 | 190405060_BAL_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tully Sparks | PHI | -1.83 | 190405050_LAN_PHI |
| Bob Ewing | CIN | -1.4 | 190405060_SLN_CIN |
| Roscoe Miller | PIT | -1.38 | 190405060_PHI_PIT |
| Jesse Stovall | DET | -1.12 | 190405060_DET_CLE |
| Ed Poole | LAN | -0.86 | 190405070_LAN_CIN |
Based on accumulated WAA for this season up to 1904-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.38 | Rube Waddell | 56 | OAK |
| +002+ | 2.38 | Joe McGinnity | 51 | SFN |
| +003+ | 2.31 | Red Donahue | 35 | CLE |
| +004+ | 2.25 | Cy Young | 41 | BOS |
| +005+ | 2.03 | Norwood Gibson | 27 | BOS |
| +006+ | 2.01 | Jesse Tannehill | 36 | BOS |
| +009+ | 1.62 | Bill Dinneen | 41 | BOS |
| +010+ | 1.6 | Harry Howell | 27.3 | BAL |
| +012+ | 1.56 | Patsy Flaherty | 43 | CHA |
| +013+ | 1.55 | Ed Killian | 50 | DET |
| +015+ | 1.47 | Jack Powell | 38.7 | NYA |
| +017+ | 1.45 | Dummy Taylor | 42 | SFN |
| +019+ | 1.32 | Bill Bernhard | 45 | CLE |
| XXXXX | 1.25 | Jack Chesbro | 53 | NYA |
| XXXXX | 1.22 | Jack Cronin | 47 | LAN |
| XXXXX | 1.22 | Frank Owen | 44 | CHA |
| XXXXX | 1.2 | Weldon Henley | 45 | OAK |
| XXXXX | 1.06 | Togie Pittinger | 44 | ATL |
| XXXXX | 0.87 | Doc White | 30 | CHA |
| XXXXX | 0.79 | George Winter | 11 | BOS |
| XXXXX | 0.76 | Bill Donovan | 45 | DET |
| XXXXX | 0.75 | Eddie Plank | 42 | OAK |
| XXXXX | 0.69 | Bob Rhoads | 17 | CLE |
| XXXXX | 0.66 | Fred Glade | 9 | BAL |
| XXXXX | 0.66 | Ed Siever | 46 | BAL |
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