| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 9.62 | 192105200_NYA_CHA |
| Fred Toney | SFN | 4.88 | 192105200_CHN_SFN |
| Babe Adams | PIT | 4.86 | 192105190_PIT_LAN |
| Stan Coveleski | CLE | 3.7 | 192105180_OAK_CLE |
| Dutch Ruether | LAN | 3.29 | 192105180_PIT_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hooks Dauss | DET | -2.25 | 192105180_BOS_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 |
| Fritz Coumbe | CIN | -0.78 | 192105200_CIN_ATL |
Based on accumulated WAA for this season up to 1921-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.63 | Red Faber | 73.7 | CHA |
| +002+ | 4.14 | Carl Mays | 80.7 | NYA |
| +005+ | 2.96 | Whitey Glazner | 49.7 | PIT |
| +008+ | 2.59 | Stan Coveleski | 76 | CLE |
| +009+ | 2.57 | Jesse Barnes | 55.7 | SFN |
| +011+ | 2.39 | Wilbur Cooper | 55 | PIT |
| +012+ | 2.38 | Sad Sam Jones | 68 | BOS |
| +013+ | 2.33 | Burleigh Grimes | 44 | LAN |
| +017+ | 1.96 | Rube Benton | 26 | SFN |
| +018+ | 1.95 | Eppa Rixey | 56.3 | CIN |
| +019+ | 1.95 | George Mogridge | 43 | MIN |
| +023+ | 1.57 | Herb Pennock | 43.7 | BOS |
| +024+ | 1.56 | Red Causey | 34 | PHI |
| +031+ | 1.36 | Earl Hamilton | 62.3 | PIT |
| XXXXX | 1.18 | Rosy Ryan | 31.3 | SFN |
| XXXXX | 1.17 | Dana Fillingim | 40.7 | ATL |
| XXXXX | 1.13 | Waite Hoyt | 49.7 | NYA |
| XXXXX | 1.13 | Fred Toney | 60.7 | SFN |
| XXXXX | 1.06 | Hugh McQuillan | 58 | ATL |
| XXXXX | 1.02 | Bill Pertica | 53 | SLN |
| XXXXX | 0.89 | Babe Adams | 45.3 | PIT |
| XXXXX | 0.8 | George Uhle | 53.7 | CLE |
| XXXXX | 0.59 | Roy Moore | 46.7 | OAK |
| XXXXX | 0.58 | Dolf Luque | 66.3 | CIN |
| XXXXX | 0.52 | Urban Shocker | 73.3 | BAL |
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