| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Faber | CHA | 11.52 | 192108180_NYA_CHA |
| Carl Mays | NYA | 5.3 | 192108180_NYA_CHA |
| George Mogridge | MIN | 2.56 | 192108170_MIN_BAL |
| Babe Adams | PIT | 2.24 | 192108162_PIT_PHI |
| Burleigh Grimes | LAN | 2.21 | 192108160_LAN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Wilkinson | CHA | -3.48 | 192108170_NYA_CHA |
| Bob Hasty | OAK | -1.49 | 192108180_OAK_CLE |
| Dixie Davis | BAL | -1.48 | 192108180_MIN_BAL |
| Phil Douglas | SFN | -0.85 | 192108180_CIN_SFN |
| Carl Holling | DET | -0.72 | 192108182_BOS_DET |
Based on accumulated WAA for this season up to 1921-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.96 | Red Faber | 277.3 | CHA |
| +003+ | 10.78 | Eppa Rixey | 229 | CIN |
| +009+ | 5.89 | Carl Mays | 246.3 | NYA |
| +011+ | 5.83 | George Mogridge | 214.7 | MIN |
| +013+ | 5.71 | Sad Sam Jones | 225 | BOS |
| +014+ | 5.6 | Jesse Barnes | 191.3 | SFN |
| +016+ | 5.33 | Burleigh Grimes | 210 | LAN |
| +017+ | 5.18 | Bill Doak | 154.7 | SLN |
| +020+ | 4.67 | Whitey Glazner | 182 | PIT |
| +025+ | 3.49 | Hugh McQuillan | 208.3 | ATL |
| +026+ | 3.44 | Stan Coveleski | 242 | CLE |
| +027+ | 3.42 | Babe Adams | 129.3 | PIT |
| +034+ | 2.91 | Dolf Luque | 228 | CIN |
| +035+ | 2.89 | Wilbur Cooper | 243 | PIT |
| +036+ | 2.84 | Joe Oeschger | 219.3 | ATL |
| +037+ | 2.74 | Waite Hoyt | 195.3 | NYA |
| +040+ | 2.62 | Earl Hamilton | 178 | PIT |
| +043+ | 2.51 | Bullet Joe Bush | 165 | BOS |
| +048+ | 2.2 | Guy Morton | 70.3 | CLE |
| +050+ | 2.16 | Dana Fillingim | 169.3 | ATL |
| +053+ | 2.04 | Johnny Morrison | 66 | PIT |
| +056+ | 1.94 | Clarence Mitchell | 128.7 | LAN |
| +057+ | 1.89 | Bill Pertica | 155.3 | SLN |
| +060+ | 1.87 | Bob Shawkey | 175 | NYA |
| +062+ | 1.8 | Pete Alexander | 179.3 | CHN |
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