| Starter | Tm | Tier | Game |
|---|---|---|---|
| Babe Adams | PIT | 4.86 | 192105190_PIT_LAN |
| Jesse Barnes | SFN | 4.84 | 192105170_CIN_SFN |
| Stan Coveleski | CLE | 3.7 | 192105180_OAK_CLE |
| Dutch Ruether | LAN | 3.29 | 192105180_PIT_LAN |
| Red Faber | CHA | 2.27 | 192105180_NYA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dutch Leonard | DET | -2.65 | 192105170_MIN_DET |
| Eric Erickson | MIN | -1.79 | 192105180_MIN_BAL |
| Scott Perry | OAK | -1.1 | 192105190_OAK_CLE |
| Mule Watson | ATL | -1.06 | 192105190_CIN_ATL |
| George Uhle | CLE | -0.58 | 192105170_NYA_CLE |
Based on accumulated WAA for this season up to 1921-05-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.59 | Red Faber | 73.7 | CHA |
| +002+ | 4.36 | Carl Mays | 74.7 | NYA |
| +005+ | 2.93 | Whitey Glazner | 49.7 | PIT |
| +008+ | 2.53 | Stan Coveleski | 76 | CLE |
| +009+ | 2.53 | Jesse Barnes | 55.7 | SFN |
| +011+ | 2.35 | Wilbur Cooper | 55 | PIT |
| +012+ | 2.31 | Sad Sam Jones | 68 | BOS |
| +013+ | 2.3 | Burleigh Grimes | 44 | LAN |
| +015+ | 1.94 | Rube Benton | 26 | SFN |
| +016+ | 1.93 | Fred Toney | 56 | SFN |
| +017+ | 1.92 | Eppa Rixey | 56.3 | CIN |
| +018+ | 1.9 | George Mogridge | 43 | MIN |
| +025+ | 1.54 | Red Causey | 34 | PHI |
| +026+ | 1.53 | Herb Pennock | 43.7 | BOS |
| +032+ | 1.32 | Hugh McQuillan | 52 | ATL |
| XXXXX | 1.16 | Rosy Ryan | 31.3 | SFN |
| XXXXX | 1.14 | Dana Fillingim | 40.7 | ATL |
| XXXXX | 1.08 | Waite Hoyt | 49.7 | NYA |
| XXXXX | 0.96 | Bill Pertica | 53 | SLN |
| XXXXX | 0.86 | Babe Adams | 45.3 | PIT |
| XXXXX | 0.76 | George Uhle | 53.7 | CLE |
| XXXXX | 0.73 | Earl Hamilton | 53.3 | PIT |
| XXXXX | 0.54 | Dolf Luque | 66.3 | CIN |
| XXXXX | 0.54 | Roy Moore | 46.7 | OAK |
| XXXXX | 0.47 | Urban Shocker | 73.3 | BAL |
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