| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jesse Barnes | SFN | 4.06 | 192106120_SFN_SLN |
| Stan Coveleski | CLE | 3.88 | 192106110_CLE_MIN |
| Babe Adams | PIT | 3.09 | 192106110_PHI_PIT |
| Dutch Ruether | LAN | 2.64 | 192106120_LAN_CIN |
| Red Faber | CHA | 2.6 | 192106130_CHA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Erickson | MIN | -2.33 | 192106130_CLE_MIN |
| Ray Caldwell | CLE | -2.25 | 192106130_CLE_MIN |
| Stan Baumgartner | PHI | -1.54 | 192106130_PHI_PIT |
| Slim Harriss | OAK | -1.17 | 192106130_BAL_OAK |
| Ferdie Schupp | SLN | -0.78 | 192106110_SFN_SLN |
Based on accumulated WAA for this season up to 1921-06-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.55 | Carl Mays | 122.7 | NYA |
| +004+ | 5.29 | Red Faber | 130.3 | CHA |
| +006+ | 4.67 | George Mogridge | 94 | MIN |
| +009+ | 4.03 | Stan Coveleski | 122.7 | CLE |
| +012+ | 3.44 | Eppa Rixey | 99.3 | CIN |
| +014+ | 3.25 | Sad Sam Jones | 109.7 | BOS |
| +016+ | 3.09 | Whitey Glazner | 83.7 | PIT |
| +017+ | 3.05 | Rube Benton | 50.3 | SFN |
| +018+ | 2.92 | Jesse Barnes | 89.7 | SFN |
| +019+ | 2.85 | Burleigh Grimes | 77 | LAN |
| +020+ | 2.8 | Dolf Luque | 110 | CIN |
| +023+ | 2.76 | Fred Toney | 88 | SFN |
| +024+ | 2.71 | Earl Hamilton | 99.7 | PIT |
| +025+ | 2.57 | Herb Pennock | 73.7 | BOS |
| +031+ | 2.04 | Wilbur Cooper | 97 | PIT |
| +033+ | 1.92 | Bill Pertica | 83 | SLN |
| +036+ | 1.89 | Rube Marquard | 100.7 | CIN |
| +039+ | 1.86 | Dana Fillingim | 76.7 | ATL |
| +043+ | 1.69 | Jimmy Zinn | 46.7 | PIT |
| +046+ | 1.64 | Sherry Smith | 84 | LAN |
| +050+ | 1.57 | Red Causey | 41.7 | PHI |
| +059+ | 1.34 | Roy Moore | 55.7 | OAK |
| XXXXX | 1.19 | Bob Shawkey | 53.7 | NYA |
| XXXXX | 1.17 | Hugh McQuillan | 98 | ATL |
| XXXXX | 1.17 | Hooks Dauss | 78 | DET |
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