| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stan Coveleski | CLE | 4.52 | 192105150_NYA_CLE |
| Wilbur Cooper | PIT | 3.74 | 192105140_PIT_PHI |
| Dutch Ruether | LAN | 3.69 | 192105140_SLN_LAN |
| Red Faber | CHA | 1.51 | 192105140_OAK_CHA |
| Dolf Luque | CIN | 0.91 | 192105140_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| George Uhle | CLE | -0.98 | 192105130_MIN_CLE |
| Ferdie Schupp | SLN | -0.85 | 192105150_SLN_LAN |
| Bob Hasty | OAK | -0.77 | 192105130_OAK_BAL |
| Harry Harper | NYA | -0.41 | 192105130_NYA_DET |
| Howard Ehmke | DET | -0.41 | 192105130_NYA_DET |
Based on accumulated WAA for this season up to 1921-05-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.16 | Carl Mays | 65.7 | NYA |
| +002+ | 3.99 | Red Faber | 62 | CHA |
| +006+ | 2.54 | Whitey Glazner | 40.7 | PIT |
| +008+ | 2.39 | Fred Toney | 51 | SFN |
| +009+ | 2.22 | Stan Coveleski | 67 | CLE |
| +011+ | 2.02 | Jesse Barnes | 44.7 | SFN |
| +012+ | 1.97 | Wilbur Cooper | 46 | PIT |
| +014+ | 1.93 | Eppa Rixey | 56.3 | CIN |
| +015+ | 1.93 | Burleigh Grimes | 35 | LAN |
| +022+ | 1.48 | Clarence Mitchell | 34.7 | LAN |
| +021+ | 1.48 | Sad Sam Jones | 59 | BOS |
| +023+ | 1.45 | Rube Benton | 18 | SFN |
| +024+ | 1.39 | Herb Pennock | 37.7 | BOS |
| +028+ | 1.3 | George Mogridge | 34 | MIN |
| XXXXX | 1.18 | Dolf Luque | 64 | CIN |
| XXXXX | 1.11 | Babe Adams | 36.3 | PIT |
| XXXXX | 1.05 | Jim Middleton | 30.3 | DET |
| XXXXX | 0.95 | Red Causey | 27 | PHI |
| XXXXX | 0.89 | Red Oldham | 40.3 | DET |
| XXXXX | 0.89 | Waite Hoyt | 40.7 | NYA |
| XXXXX | 0.85 | Bill Pertica | 44.3 | SLN |
| XXXXX | 0.84 | Rosy Ryan | 27.3 | SFN |
| XXXXX | 0.74 | Hugh McQuillan | 43 | ATL |
| XXXXX | 0.74 | Earl Hamilton | 46.3 | PIT |
| XXXXX | 0.56 | Dana Fillingim | 31.7 | ATL |
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