| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Faber | CHA | 10.94 | 192108030_CHA_BOS |
| Eppa Rixey | CIN | 8 | 192108050_LAN_CIN |
| Carl Mays | NYA | 5.93 | 192108050_DET_NYA |
| Pete Alexander | CHN | 3.21 | 192108031_ATL_CHN |
| Wilbur Cooper | PIT | 3.16 | 192108030_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dominic Mulrenan | CHA | -1.77 | 192108050_CHA_BOS |
| Jim Bagby | CLE | -1.2 | 192108050_CLE_MIN |
| Hooks Dauss | DET | -0.93 | 192108050_DET_NYA |
| Speed Martin | CHN | -0.81 | 192108032_ATL_CHN |
| Phil Douglas | SFN | -0.6 | 192108030_SFN_SLN |
Based on accumulated WAA for this season up to 1921-08-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.65 | Red Faber | 248.7 | CHA |
| +003+ | 9.09 | Eppa Rixey | 203 | CIN |
| +007+ | 6.62 | George Mogridge | 201.3 | MIN |
| +010+ | 5.82 | Carl Mays | 221 | NYA |
| +013+ | 5.05 | Jesse Barnes | 169.3 | SFN |
| +016+ | 4.48 | Burleigh Grimes | 183 | LAN |
| +018+ | 4.06 | Wilbur Cooper | 217 | PIT |
| +020+ | 3.89 | Bill Doak | 134.7 | SLN |
| +021+ | 3.72 | Bullet Joe Bush | 157.7 | BOS |
| +023+ | 3.68 | Joe Oeschger | 193 | ATL |
| +025+ | 3.64 | Pete Alexander | 157 | CHN |
| +024+ | 3.64 | Waite Hoyt | 177.7 | NYA |
| +027+ | 3.43 | Babe Adams | 120.3 | PIT |
| +029+ | 3.37 | Sad Sam Jones | 198 | BOS |
| +030+ | 3.35 | Whitey Glazner | 154 | PIT |
| +031+ | 3.33 | Stan Coveleski | 222.7 | CLE |
| +033+ | 3.17 | Hugh McQuillan | 183 | ATL |
| +035+ | 2.6 | Dolf Luque | 201 | CIN |
| +040+ | 2.5 | Dana Fillingim | 151 | ATL |
| +041+ | 2.44 | Bill Pertica | 146 | SLN |
| +043+ | 2.37 | Earl Hamilton | 161.7 | PIT |
| +056+ | 1.88 | Rube Marquard | 173.7 | CIN |
| +058+ | 1.76 | Guy Morton | 54.3 | CLE |
| +071+ | 1.43 | Slim Harriss | 174.7 | OAK |
| +072+ | 1.39 | Jack Scott | 150.3 | ATL |
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