| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 8.38 | 192107042_OAK_NYA |
| Jesse Barnes | SFN | 7.4 | 192107032_ATL_SFN |
| Wilbur Cooper | PIT | 3.91 | 192107042_SLN_PIT |
| Red Faber | CHA | 3.36 | 192107030_CHA_BAL |
| Stan Coveleski | CLE | 2.94 | 192107030_DET_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Howard Ehmke | DET | -1.88 | 192107050_DET_BAL |
| Dickey Kerr | CHA | -1.79 | 192107042_CHA_CLE |
| Bob Hasty | OAK | -1.23 | 192107050_OAK_NYA |
| Dixie Davis | BAL | -1.23 | 192107030_CHA_BAL |
| Allen Sothoron | CLE | -1.11 | 192107050_CHA_CLE |
Based on accumulated WAA for this season up to 1921-07-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 6.32 | Eppa Rixey | 143.3 | CIN |
| +005+ | 6.29 | Carl Mays | 162.7 | NYA |
| +006+ | 6.19 | Red Faber | 172.7 | CHA |
| +009+ | 4.71 | George Mogridge | 133 | MIN |
| +010+ | 4.55 | Burleigh Grimes | 115 | LAN |
| +011+ | 4.37 | Jesse Barnes | 120.7 | SFN |
| +018+ | 3.62 | Whitey Glazner | 119 | PIT |
| +020+ | 3.5 | Wilbur Cooper | 149 | PIT |
| +023+ | 2.92 | Dolf Luque | 149.3 | CIN |
| +025+ | 2.74 | Stan Coveleski | 161.7 | CLE |
| +026+ | 2.63 | Fred Toney | 115.7 | SFN |
| +028+ | 2.46 | Rube Marquard | 129.7 | CIN |
| +029+ | 2.45 | Herb Pennock | 111.3 | BOS |
| +030+ | 2.4 | Sad Sam Jones | 138.3 | BOS |
| +032+ | 2.39 | Bill Doak | 87.3 | SLN |
| +033+ | 2.35 | Bill Piercy | 63.3 | NYA |
| +037+ | 2.23 | Babe Adams | 86.3 | PIT |
| +036+ | 2.23 | Hugh McQuillan | 130.7 | ATL |
| +038+ | 2.16 | Dana Fillingim | 103.7 | ATL |
| +041+ | 2.05 | Earl Hamilton | 124.7 | PIT |
| +043+ | 1.99 | Elam Vangilder | 63.3 | BAL |
| +048+ | 1.76 | Roy Walker | 83 | SLN |
| +051+ | 1.73 | Waite Hoyt | 126.3 | NYA |
| +053+ | 1.66 | Red Causey | 50.7 | PHI |
| +058+ | 1.56 | Allen Russell | 89.7 | BOS |
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