| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jesse Barnes | SFN | 4.91 | 192105120_SLN_SFN |
| Stan Coveleski | CLE | 3.48 | 192105110_MIN_CLE |
| Hippo Vaughn | CHN | 2.43 | 192105110_CHN_PHI |
| Sherry Smith | LAN | 1.39 | 192105110_CIN_LAN |
| Walter Johnson | MIN | 0.81 | 192105110_MIN_CLE |
| 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 |
| Roy Moore | OAK | -0.81 | 192105110_OAK_BAL |
Based on accumulated WAA for this season up to 1921-05-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.07 | Carl Mays | 65.7 | NYA |
| +002+ | 3.32 | Red Faber | 53 | CHA |
| +006+ | 2.71 | Stan Coveleski | 64 | CLE |
| +007+ | 2.51 | Whitey Glazner | 40.7 | PIT |
| +008+ | 2.38 | Bill Piercy | 44 | NYA |
| +009+ | 2.34 | Fred Toney | 51 | SFN |
| +012+ | 1.97 | Jesse Barnes | 44.7 | SFN |
| +014+ | 1.89 | Burleigh Grimes | 35 | LAN |
| +013+ | 1.89 | Wilbur Cooper | 36 | PIT |
| +016+ | 1.83 | Eppa Rixey | 56.3 | CIN |
| +020+ | 1.42 | Sad Sam Jones | 59 | BOS |
| +024+ | 1.38 | Dolf Luque | 56 | CIN |
| +025+ | 1.36 | Herb Pennock | 37.7 | BOS |
| +026+ | 1.35 | Clarence Mitchell | 33.7 | LAN |
| XXXXX | 1.23 | George Mogridge | 34 | MIN |
| XXXXX | 1.08 | Babe Adams | 36.3 | PIT |
| XXXXX | 1.01 | Jim Middleton | 30.3 | DET |
| XXXXX | 0.93 | Red Causey | 27 | PHI |
| XXXXX | 0.81 | Urban Shocker | 58.7 | BAL |
| XXXXX | 0.81 | Rosy Ryan | 27.3 | SFN |
| XXXXX | 0.69 | Hugh McQuillan | 43 | ATL |
| XXXXX | 0.69 | Earl Hamilton | 46.3 | PIT |
| XXXXX | 0.68 | Dutch Ruether | 42.7 | LAN |
| XXXXX | 0.62 | Suds Sutherland | 30.7 | DET |
| XXXXX | 0.61 | Rube Benton | 9 | SFN |
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