| Starter | Tm | Tier | Game |
|---|---|---|---|
| Burleigh Grimes | LAN | 4.79 | 192109181_LAN_CHN |
| George Mogridge | MIN | 3.6 | 192109170_CLE_MIN |
| Sad Sam Jones | BOS | 3.47 | 192109170_CHA_BOS |
| Bill Doak | SLN | 3.31 | 192109170_PHI_SLN |
| Waite Hoyt | NYA | 2.94 | 192109180_DET_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Wilkinson | CHA | -3.6 | 192109160_CHA_BOS |
| Howard Ehmke | DET | -1.43 | 192109160_DET_OAK |
| Virgil Cheeves | CHN | -1.43 | 192109181_LAN_CHN |
| Jimmy Ring | PHI | -0.8 | 192109180_PHI_SLN |
| Dutch Ruether | LAN | -0.71 | 192109182_LAN_CHN |
Based on accumulated WAA for this season up to 1921-09-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +007+ | 9.04 | Eppa Rixey | 278.7 | CIN |
| +009+ | 8.16 | Burleigh Grimes | 277.3 | LAN |
| +011+ | 7.95 | Carl Mays | 309.3 | NYA |
| +014+ | 6.62 | Jesse Barnes | 249.3 | SFN |
| +017+ | 6.54 | Bill Doak | 193 | SLN |
| +018+ | 6.4 | Waite Hoyt | 262 | NYA |
| +019+ | 6.12 | George Mogridge | 270.7 | MIN |
| +020+ | 5.97 | Sad Sam Jones | 282.7 | BOS |
| +023+ | 5.15 | Stan Coveleski | 296 | CLE |
| +024+ | 5.1 | Whitey Glazner | 219.3 | PIT |
| +026+ | 4.5 | Dolf Luque | 295 | CIN |
| +027+ | 4.47 | Wilbur Cooper | 300 | PIT |
| +029+ | 4.21 | Pete Alexander | 227.3 | CHN |
| +034+ | 3.96 | Joe Oeschger | 281 | ATL |
| +037+ | 3.75 | Bill Pertica | 199 | SLN |
| +039+ | 3.69 | Rube Marquard | 246.7 | CIN |
| +043+ | 3.39 | Bullet Joe Bush | 220.3 | BOS |
| +044+ | 3.36 | Dana Fillingim | 227.3 | ATL |
| +046+ | 3.3 | Clarence Mitchell | 165 | LAN |
| +047+ | 3.24 | Johnny Morrison | 123 | PIT |
| +049+ | 2.97 | Benn Karr | 88.3 | BOS |
| +050+ | 2.9 | Fred Toney | 243.3 | SFN |
| +051+ | 2.85 | Jesse Haines | 218.3 | SLN |
| +053+ | 2.66 | Walter Johnson | 238 | MIN |
| +063+ | 2.1 | Urban Shocker | 300.7 | BAL |
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