| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 7.86 | 192105100_NYA_DET |
| Fred Toney | SFN | 4.45 | 192105110_SLN_SFN |
| Pete Alexander | CHN | 3.84 | 192105100_CHN_PHI |
| Stan Coveleski | CLE | 3.48 | 192105110_MIN_CLE |
| Dutch Ruether | LAN | 3.36 | 192105100_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Causey | PHI | -1.93 | 192105092_LAN_PHI |
| Bullet Joe Bush | BOS | -1.25 | 192105100_BOS_CHA |
| Roy Moore | OAK | -0.81 | 192105110_OAK_BAL |
| Joe Oeschger | ATL | -0.65 | 192105100_PIT_ATL |
| Waite Hoyt | NYA | -0.57 | 192105110_NYA_DET |
Based on accumulated WAA for this season up to 1921-05-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.86 | Carl Mays | 64.3 | NYA |
| +002+ | 3.25 | Red Faber | 53 | CHA |
| +004+ | 2.63 | Stan Coveleski | 64 | CLE |
| +005+ | 2.32 | Bill Piercy | 44 | NYA |
| +007+ | 2.22 | Sad Sam Jones | 50 | BOS |
| +008+ | 2.21 | Fred Toney | 51 | SFN |
| +010+ | 2.07 | Jesse Barnes | 40 | SFN |
| +012+ | 1.84 | Wilbur Cooper | 36 | PIT |
| +015+ | 1.76 | Burleigh Grimes | 27 | LAN |
| +016+ | 1.68 | Whitey Glazner | 31.7 | PIT |
| +018+ | 1.56 | Eppa Rixey | 47.3 | CIN |
| +025+ | 1.31 | Herb Pennock | 37.7 | BOS |
| +026+ | 1.29 | Dolf Luque | 56 | CIN |
| XXXXX | 1.22 | Clarence Mitchell | 32.7 | LAN |
| XXXXX | 1.03 | Babe Adams | 36.3 | PIT |
| XXXXX | 0.97 | Jim Middleton | 30.3 | DET |
| XXXXX | 0.89 | Red Causey | 27 | PHI |
| XXXXX | 0.74 | Urban Shocker | 58.7 | BAL |
| XXXXX | 0.63 | Earl Hamilton | 46.3 | PIT |
| XXXXX | 0.63 | Hugh McQuillan | 43 | ATL |
| XXXXX | 0.63 | Dutch Ruether | 42.7 | LAN |
| XXXXX | 0.63 | George Mogridge | 25 | MIN |
| XXXXX | 0.59 | Rube Benton | 9 | SFN |
| XXXXX | 0.58 | Suds Sutherland | 30.7 | DET |
| XXXXX | 0.51 | Red Oldham | 32.3 | DET |
_