| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 7.99 | 192107210_NYA_CLE |
| Red Faber | CHA | 7.06 | 192107210_OAK_CHA |
| Jesse Barnes | SFN | 4.77 | 192107232_CIN_SFN |
| Pete Alexander | CHN | 3.45 | 192107230_CHN_PHI |
| Wilbur Cooper | PIT | 2.07 | 192107231_PIT_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Caldwell | CLE | -2.57 | 192107210_NYA_CLE |
| Dickey Kerr | CHA | -1.91 | 192107230_OAK_CHA |
| Dixie Davis | BAL | -1.82 | 192107230_BOS_BAL |
| Howard Ehmke | DET | -1.36 | 192107230_MIN_DET |
| Bob Hasty | OAK | -1.28 | 192107230_OAK_CHA |
Based on accumulated WAA for this season up to 1921-07-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.52 | Red Faber | 223.7 | CHA |
| +003+ | 7.96 | Eppa Rixey | 171 | CIN |
| +008+ | 5.54 | Carl Mays | 192.7 | NYA |
| +009+ | 5.43 | George Mogridge | 176.7 | MIN |
| +011+ | 5.08 | Jesse Barnes | 148.7 | SFN |
| +016+ | 4.33 | Pete Alexander | 131 | CHN |
| +019+ | 3.75 | Bill Doak | 114.7 | SLN |
| +020+ | 3.73 | Whitey Glazner | 144 | PIT |
| +021+ | 3.71 | Burleigh Grimes | 157 | LAN |
| +023+ | 3.53 | Wilbur Cooper | 190 | PIT |
| +026+ | 3.26 | Hugh McQuillan | 164 | ATL |
| +027+ | 3.19 | Sad Sam Jones | 175 | BOS |
| +029+ | 3.03 | Dolf Luque | 178.7 | CIN |
| +030+ | 2.84 | Elmer Ponder | 57.7 | TOT |
| +032+ | 2.65 | Babe Adams | 102.3 | PIT |
| +031+ | 2.65 | Dana Fillingim | 139.3 | ATL |
| +033+ | 2.58 | Joe Oeschger | 168 | ATL |
| +035+ | 2.53 | Herb Pennock | 131 | BOS |
| +037+ | 2.43 | Waite Hoyt | 159.7 | NYA |
| +039+ | 2.34 | Bob Shawkey | 129.7 | NYA |
| +041+ | 2.29 | Bullet Joe Bush | 130.7 | BOS |
| +047+ | 2.01 | Stan Coveleski | 195.7 | CLE |
| +049+ | 1.99 | Earl Hamilton | 145.7 | PIT |
| +053+ | 1.93 | Fred Toney | 137.7 | SFN |
| +061+ | 1.76 | Allen Russell | 118.7 | BOS |
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