| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 6.72 | 192107180_NYA_DET |
| Red Faber | CHA | 5.98 | 192107170_BOS_CHA |
| Jesse Barnes | SFN | 4.99 | 192107170_PIT_SFN |
| Eppa Rixey | CIN | 3.8 | 192107161_CIN_PHI |
| Wilbur Cooper | PIT | 3.22 | 192107160_PIT_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Shovel Hodge | CHA | -6.19 | 192107182_BOS_CHA |
| Stan Baumgartner | PHI | -2.31 | 192107182_CIN_PHI |
| Ray Caldwell | CLE | -1.9 | 192107170_MIN_CLE |
| Harry Courtney | MIN | -1.32 | 192107160_MIN_CLE |
| Dixie Davis | BAL | -0.95 | 192107160_OAK_BAL |
Based on accumulated WAA for this season up to 1921-07-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.73 | Red Faber | 209.7 | CHA |
| +005+ | 7.34 | Eppa Rixey | 162 | CIN |
| +006+ | 6.65 | Carl Mays | 190 | NYA |
| +009+ | 5.81 | George Mogridge | 168.7 | MIN |
| +013+ | 4.65 | Jesse Barnes | 143.7 | SFN |
| +018+ | 3.55 | Burleigh Grimes | 144 | LAN |
| +021+ | 3.37 | Sad Sam Jones | 175 | BOS |
| +024+ | 3.29 | Herb Pennock | 126.7 | BOS |
| +025+ | 3.26 | Bill Doak | 104.3 | SLN |
| +027+ | 2.97 | Stan Coveleski | 188.7 | CLE |
| +028+ | 2.75 | Hugh McQuillan | 154 | ATL |
| +030+ | 2.6 | Pete Alexander | 111 | CHN |
| +031+ | 2.59 | Waite Hoyt | 142.7 | NYA |
| +032+ | 2.5 | Dolf Luque | 168.3 | CIN |
| +033+ | 2.47 | Wilbur Cooper | 172 | PIT |
| +034+ | 2.45 | Dana Fillingim | 126.3 | ATL |
| +035+ | 2.38 | Joe Oeschger | 159 | ATL |
| +036+ | 2.35 | Rosy Ryan | 99.7 | SFN |
| +039+ | 2.26 | Elmer Ponder | 48.7 | TOT |
| +045+ | 2.12 | Babe Adams | 93.3 | PIT |
| +055+ | 1.82 | Allen Russell | 113.7 | BOS |
| +056+ | 1.77 | Bob Shawkey | 120.7 | NYA |
| +057+ | 1.75 | Fred Toney | 128.7 | SFN |
| +061+ | 1.72 | Bullet Joe Bush | 112.7 | BOS |
| +063+ | 1.69 | Earl Hamilton | 136.3 | PIT |
_