| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 9.28 | 192105160_NYA_CLE |
| Fred Toney | SFN | 5.68 | 192105160_CIN_SFN |
| Wilbur Cooper | PIT | 3.91 | 192105180_PIT_LAN |
| Stan Coveleski | CLE | 3.7 | 192105180_OAK_CLE |
| Dutch Ruether | LAN | 3.29 | 192105180_PIT_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dutch Leonard | DET | -2.65 | 192105170_MIN_DET |
| Eric Erickson | MIN | -1.79 | 192105180_MIN_BAL |
| Red Causey | PHI | -1.45 | 192105160_PIT_PHI |
| Scott Perry | OAK | -0.94 | 192105160_OAK_CHA |
| Bullet Joe Bush | BOS | -0.72 | 192105160_BOS_BAL |
Based on accumulated WAA for this season up to 1921-05-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.62 | Red Faber | 73.7 | CHA |
| +002+ | 4.39 | Carl Mays | 74.7 | NYA |
| +005+ | 2.95 | Whitey Glazner | 49.7 | PIT |
| +007+ | 2.61 | Stan Coveleski | 76 | CLE |
| +008+ | 2.56 | Jesse Barnes | 55.7 | SFN |
| +010+ | 2.37 | Wilbur Cooper | 55 | PIT |
| +012+ | 2.32 | Burleigh Grimes | 44 | LAN |
| +013+ | 2.32 | Sad Sam Jones | 68 | BOS |
| +015+ | 1.96 | Fred Toney | 56 | SFN |
| +016+ | 1.95 | Rube Benton | 26 | SFN |
| +018+ | 1.93 | Eppa Rixey | 56.3 | CIN |
| +019+ | 1.92 | George Mogridge | 43 | MIN |
| +024+ | 1.58 | Red Causey | 34 | PHI |
| +026+ | 1.53 | Herb Pennock | 43.7 | BOS |
| +029+ | 1.34 | Hugh McQuillan | 52 | ATL |
| XXXXX | 1.18 | Rosy Ryan | 31.3 | SFN |
| XXXXX | 1.16 | Dana Fillingim | 40.7 | ATL |
| XXXXX | 1.13 | Babe Adams | 36.3 | PIT |
| XXXXX | 1.05 | Bill Pertica | 53 | SLN |
| XXXXX | 0.98 | Red Oldham | 41.3 | DET |
| XXXXX | 0.92 | Waite Hoyt | 40.7 | NYA |
| XXXXX | 0.82 | George Uhle | 53.7 | CLE |
| XXXXX | 0.75 | Earl Hamilton | 53.3 | PIT |
| XXXXX | 0.58 | Roy Moore | 46.7 | OAK |
| XXXXX | 0.56 | Dolf Luque | 66.3 | CIN |
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