| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Faber | CHA | 5.14 | 192107100_NYA_CHA |
| Jesse Barnes | SFN | 4.8 | 192107120_SLN_SFN |
| Eppa Rixey | CIN | 3.23 | 192107110_CIN_ATL |
| Wilbur Cooper | PIT | 3.04 | 192107120_PIT_PHI |
| Burleigh Grimes | LAN | 2.95 | 192107100_PIT_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Wilkinson | CHA | -3.13 | 192107120_MIN_CHA |
| Stan Baumgartner | PHI | -2.77 | 192107120_PIT_PHI |
| Ray Caldwell | CLE | -2.25 | 192107122_BOS_CLE |
| Eric Erickson | MIN | -2.09 | 192107110_MIN_BAL |
| Bob Hasty | OAK | -1.95 | 192107102_OAK_CLE |
Based on accumulated WAA for this season up to 1921-07-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.38 | Red Faber | 190.7 | CHA |
| +005+ | 6.63 | Eppa Rixey | 151.3 | CIN |
| +008+ | 5.46 | Carl Mays | 171.7 | NYA |
| +009+ | 5.31 | George Mogridge | 153.7 | MIN |
| +012+ | 4.7 | Burleigh Grimes | 133 | LAN |
| +014+ | 4.44 | Jesse Barnes | 135.7 | SFN |
| +015+ | 4.14 | Whitey Glazner | 128 | PIT |
| +018+ | 3.78 | Wilbur Cooper | 167 | PIT |
| +023+ | 3.17 | Sad Sam Jones | 156.3 | BOS |
| +024+ | 3.08 | Stan Coveleski | 179.7 | CLE |
| +026+ | 2.99 | Herb Pennock | 120.3 | BOS |
| +027+ | 2.96 | Bill Doak | 98.3 | SLN |
| +029+ | 2.8 | Dolf Luque | 157.3 | CIN |
| +031+ | 2.52 | Dana Fillingim | 108.3 | ATL |
| +032+ | 2.44 | Joe Oeschger | 151.7 | ATL |
| +033+ | 2.42 | Allen Russell | 101.7 | BOS |
| +034+ | 2.35 | Roy Walker | 92 | SLN |
| +035+ | 2.34 | Hugh McQuillan | 144 | ATL |
| +037+ | 2.26 | Bill Piercy | 63.3 | NYA |
| +040+ | 2.18 | Babe Adams | 93.3 | PIT |
| +039+ | 2.18 | Pete Alexander | 102 | CHN |
| +046+ | 1.91 | Rosy Ryan | 89.7 | SFN |
| +048+ | 1.88 | Fred Toney | 128.7 | SFN |
| +053+ | 1.79 | Roy Moore | 100 | OAK |
| +054+ | 1.76 | Johnny Morrison | 46 | PIT |
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