| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rube Waddell | OAK | 6.23 | 190409291_OAK_BAL |
| Jack Chesbro | NYA | 5.71 | 190409300_NYA_CHA |
| Joe McGinnity | SFN | 2.85 | 190409301_CHN_SFN |
| Cy Young | BOS | 2.82 | 190409290_BOS_CLE |
| Bill Bernhard | CLE | 1.9 | 190409290_BOS_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Duggleby | PHI | -5.59 | 190409291_CIN_PHI |
| Vic Willis | ATL | -3.07 | 190409301_PIT_ATL |
| Fred Mitchell | LAN | -1.98 | 190409300_SLN_LAN |
| Happy Townsend | MIN | -0.4 | 190409300_MIN_CLE |
| Jack Harper | CIN | -0.38 | 190409291_CIN_PHI |
Based on accumulated WAA for this season up to 1904-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 13.44 | Rube Waddell | 361.7 | OAK |
| +002+ | 13.44 | Jack Chesbro | 414.7 | NYA |
| +003+ | 9.95 | Eddie Plank | 354.3 | OAK |
| +005+ | 9.62 | Joe McGinnity | 399.3 | SFN |
| +006+ | 9.08 | Cy Young | 355 | BOS |
| +008+ | 7.65 | Doc White | 205 | CHA |
| +009+ | 7.6 | Jesse Tannehill | 281.7 | BOS |
| +010+ | 7.47 | Bill Bernhard | 308.7 | CLE |
| +011+ | 6.92 | Harry Howell | 282.7 | BAL |
| +012+ | 6.65 | Addie Joss | 183.3 | CLE |
| +013+ | 6.5 | Bill Dinneen | 300.7 | BOS |
| +015+ | 6.08 | Jack Powell | 366.7 | NYA |
| +019+ | 5.68 | Norwood Gibson | 256 | BOS |
| +020+ | 5.67 | Ed Killian | 323.7 | DET |
| +021+ | 5.57 | George Mullin | 351.3 | DET |
| +022+ | 5.44 | Fred Glade | 279.7 | BAL |
| +023+ | 5.21 | Frank Smith | 192.3 | CHA |
| +028+ | 4.79 | Red Donahue | 259 | CLE |
| +030+ | 4.5 | Otto Hess | 132.3 | CLE |
| +032+ | 4.45 | Kid Nichols | 300 | SLN |
| +034+ | 4.3 | Bill Donovan | 293 | DET |
| +037+ | 4.04 | Weldon Henley | 286.7 | OAK |
| +046+ | 3.32 | Roy Patterson | 142.7 | CHA |
| +050+ | 3 | Jake Weimer | 297.7 | CHN |
| +052+ | 2.93 | Patsy Flaherty | 273 | TOT |
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