| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jesse Barnes | SFN | 4.91 | 192105120_SLN_SFN |
| 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 |
|---|---|---|---|
| Eric Erickson | MIN | -2.4 | 192105120_MIN_CLE |
| Mule Watson | ATL | -1.67 | 192105120_PIT_ATL |
| Hooks Dauss | DET | -1.18 | 192105120_NYA_DET |
| George Uhle | CLE | -0.98 | 192105130_MIN_CLE |
| Bob Hasty | OAK | -0.77 | 192105130_OAK_BAL |
Based on accumulated WAA for this season up to 1921-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.05 | Carl Mays | 65.7 | NYA |
| +002+ | 3.9 | Red Faber | 62 | CHA |
| +005+ | 2.69 | Stan Coveleski | 64 | CLE |
| +007+ | 2.48 | Whitey Glazner | 40.7 | PIT |
| +009+ | 2.31 | Fred Toney | 51 | SFN |
| +011+ | 1.95 | Jesse Barnes | 44.7 | SFN |
| +013+ | 1.89 | Wilbur Cooper | 46 | PIT |
| +014+ | 1.87 | Burleigh Grimes | 35 | LAN |
| +016+ | 1.83 | Eppa Rixey | 56.3 | CIN |
| +021+ | 1.43 | Sad Sam Jones | 59 | BOS |
| +022+ | 1.42 | Clarence Mitchell | 34.7 | LAN |
| +023+ | 1.42 | Rube Benton | 18 | SFN |
| +027+ | 1.36 | Herb Pennock | 37.7 | BOS |
| XXXXX | 1.24 | George Mogridge | 34 | MIN |
| XXXXX | 1.06 | Dolf Luque | 64 | CIN |
| XXXXX | 1.05 | Babe Adams | 36.3 | PIT |
| XXXXX | 1.03 | Urban Shocker | 61.3 | BAL |
| XXXXX | 1 | Jim Middleton | 30.3 | DET |
| XXXXX | 0.91 | Red Causey | 27 | PHI |
| XXXXX | 0.83 | Red Oldham | 40.3 | DET |
| XXXXX | 0.8 | Rosy Ryan | 27.3 | SFN |
| XXXXX | 0.79 | Bill Pertica | 44.3 | SLN |
| XXXXX | 0.67 | Hugh McQuillan | 43 | ATL |
| XXXXX | 0.66 | Earl Hamilton | 46.3 | PIT |
| XXXXX | 0.61 | Suds Sutherland | 30.7 | DET |
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