| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 5.9 | 192107130_NYA_BAL |
| Red Faber | CHA | 5.08 | 192107140_MIN_CHA |
| Burleigh Grimes | LAN | 2.62 | 192107140_CIN_LAN |
| Dolf Luque | CIN | 1.89 | 192107130_CIN_LAN |
| George Mogridge | MIN | 1.07 | 192107140_MIN_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Shovel Hodge | CHA | -5.51 | 192107130_MIN_CHA |
| Jim Shaw | MIN | -1.73 | 192107130_MIN_CHA |
| Carl Holling | DET | -1.17 | 192107130_OAK_DET |
| Bob Hasty | OAK | -0.96 | 192107150_OAK_DET |
| Lefty York | CHN | -0.68 | 192107131_CHN_ATL |
Based on accumulated WAA for this season up to 1921-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.9 | Red Faber | 199.7 | CHA |
| +005+ | 6.74 | Eppa Rixey | 153 | CIN |
| +007+ | 6.04 | Carl Mays | 180.7 | NYA |
| +009+ | 5.28 | George Mogridge | 160.7 | MIN |
| +013+ | 4.37 | Jesse Barnes | 135.7 | SFN |
| +014+ | 4.08 | Whitey Glazner | 128 | PIT |
| +015+ | 3.96 | Burleigh Grimes | 139 | LAN |
| +018+ | 3.71 | Wilbur Cooper | 167 | PIT |
| +021+ | 3.57 | Sad Sam Jones | 165.3 | BOS |
| +023+ | 3.36 | Herb Pennock | 126.7 | BOS |
| +026+ | 3.02 | Stan Coveleski | 179.7 | CLE |
| +027+ | 2.92 | Bill Doak | 98.3 | SLN |
| +029+ | 2.71 | Dana Fillingim | 117.3 | ATL |
| +030+ | 2.64 | Waite Hoyt | 142.7 | NYA |
| +031+ | 2.41 | Allen Russell | 112.7 | BOS |
| +032+ | 2.4 | Rosy Ryan | 99.7 | SFN |
| +033+ | 2.39 | Joe Oeschger | 151.7 | ATL |
| +036+ | 2.29 | Hugh McQuillan | 144 | ATL |
| +040+ | 2.18 | Pete Alexander | 102 | CHN |
| +043+ | 2.16 | Dolf Luque | 162 | CIN |
| +044+ | 2.13 | Babe Adams | 93.3 | PIT |
| +052+ | 1.81 | Fred Toney | 128.7 | SFN |
| +056+ | 1.74 | Johnny Morrison | 46 | PIT |
| +062+ | 1.63 | Rube Marquard | 143.7 | CIN |
| +065+ | 1.59 | Red Causey | 50.7 | PHI |
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