| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Faber | CHA | 8.34 | 192107260_CHA_MIN |
| Carl Mays | NYA | 5.5 | 192107270_BAL_NYA |
| Pete Alexander | CHN | 4.49 | 192107260_LAN_CHN |
| Babe Adams | PIT | 2.15 | 192107250_SFN_PIT |
| Bill Doak | SLN | 2.07 | 192107260_PHI_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dickey Kerr | CHA | -1.64 | 192107270_CHA_MIN |
| Tom Zachary | MIN | -1.15 | 192107260_CHA_MIN |
| Hooks Dauss | DET | -0.64 | 192107270_DET_OAK |
| Rollie Naylor | OAK | -0.5 | 192107270_DET_OAK |
| Phil Douglas | SFN | -0.14 | 192107250_SFN_PIT |
Based on accumulated WAA for this season up to 1921-07-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.9 | Red Faber | 231.7 | CHA |
| +003+ | 8.6 | Eppa Rixey | 180 | CIN |
| +010+ | 5.21 | George Mogridge | 183.3 | MIN |
| +012+ | 5.05 | Jesse Barnes | 150.7 | SFN |
| +013+ | 5.04 | Carl Mays | 203 | NYA |
| +014+ | 4.55 | Burleigh Grimes | 166 | LAN |
| +017+ | 4.47 | Pete Alexander | 139 | CHN |
| +019+ | 3.88 | Dolf Luque | 187.7 | CIN |
| +020+ | 3.81 | Sad Sam Jones | 184 | BOS |
| +021+ | 3.78 | Bill Doak | 119.7 | SLN |
| +022+ | 3.71 | Wilbur Cooper | 199 | PIT |
| +025+ | 3.6 | Whitey Glazner | 145 | PIT |
| +027+ | 3.25 | Babe Adams | 111.3 | PIT |
| +029+ | 3.21 | Hugh McQuillan | 172 | ATL |
| +031+ | 2.75 | Dana Fillingim | 142.3 | ATL |
| +035+ | 2.57 | Bob Shawkey | 136.7 | NYA |
| +036+ | 2.53 | Stan Coveleski | 205.7 | CLE |
| +037+ | 2.44 | Joe Oeschger | 175 | ATL |
| +038+ | 2.43 | Waite Hoyt | 159.7 | NYA |
| +044+ | 2.28 | Bullet Joe Bush | 139.7 | BOS |
| +057+ | 1.78 | Herb Pennock | 141 | BOS |
| +058+ | 1.74 | Allen Russell | 118.7 | BOS |
| +065+ | 1.57 | Earl Hamilton | 152.7 | PIT |
| +067+ | 1.54 | Fred Toney | 144.7 | SFN |
| +069+ | 1.47 | Guy Morton | 44.7 | CLE |
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