| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 9.28 | 192105160_NYA_CLE |
| Fred Toney | SFN | 5.68 | 192105160_CIN_SFN |
| Stan Coveleski | CLE | 4.52 | 192105150_NYA_CLE |
| Wilbur Cooper | PIT | 3.74 | 192105140_PIT_PHI |
| Dutch Ruether | LAN | 3.69 | 192105140_SLN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Causey | PHI | -1.45 | 192105160_PIT_PHI |
| Scott Perry | OAK | -0.94 | 192105160_OAK_CHA |
| Ferdie Schupp | SLN | -0.85 | 192105150_SLN_LAN |
| Bullet Joe Bush | BOS | -0.72 | 192105160_BOS_BAL |
| Fritz Coumbe | CIN | -0.4 | 192105160_CIN_SFN |
Based on accumulated WAA for this season up to 1921-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.4 | Carl Mays | 74.7 | NYA |
| +002+ | 4.29 | Red Faber | 64.7 | CHA |
| +006+ | 2.6 | Whitey Glazner | 40.7 | PIT |
| +009+ | 2.29 | Stan Coveleski | 67 | CLE |
| +012+ | 2.06 | Jesse Barnes | 44.7 | SFN |
| +011+ | 2.06 | Fred Toney | 56 | SFN |
| +013+ | 2.03 | Wilbur Cooper | 46 | PIT |
| +014+ | 2 | Eppa Rixey | 56.3 | CIN |
| +015+ | 1.96 | Burleigh Grimes | 35 | LAN |
| +019+ | 1.61 | Red Causey | 34 | PHI |
| +022+ | 1.53 | Sad Sam Jones | 59 | BOS |
| +024+ | 1.47 | Rube Benton | 18 | SFN |
| +025+ | 1.42 | Herb Pennock | 37.7 | BOS |
| +026+ | 1.39 | Hugh McQuillan | 52 | ATL |
| +029+ | 1.35 | George Mogridge | 34 | MIN |
| +031+ | 1.26 | Dolf Luque | 64 | CIN |
| XXXXX | 1.24 | Rosy Ryan | 31.3 | SFN |
| XXXXX | 1.16 | Babe Adams | 36.3 | PIT |
| XXXXX | 0.93 | Red Oldham | 40.3 | DET |
| XXXXX | 0.93 | Waite Hoyt | 40.7 | NYA |
| XXXXX | 0.89 | Bill Pertica | 44.3 | SLN |
| XXXXX | 0.8 | Earl Hamilton | 53.3 | PIT |
| XXXXX | 0.59 | Dana Fillingim | 31.7 | ATL |
| XXXXX | 0.58 | Dutch Ruether | 49.7 | LAN |
| XXXXX | 0.58 | Roy Moore | 46.7 | OAK |
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