| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 10.06 | 192106100_CLE_NYA |
| Fred Toney | SFN | 4.19 | 192106100_SFN_CIN |
| Stan Coveleski | CLE | 3.88 | 192106110_CLE_MIN |
| Dutch Ruether | LAN | 3.52 | 192106100_LAN_SLN |
| Babe Adams | PIT | 3.09 | 192106110_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Caldwell | CLE | -2.36 | 192106090_CLE_NYA |
| Dickey Kerr | CHA | -1.96 | 192106100_CHA_OAK |
| George Smith | PHI | -1.17 | 192106090_PHI_CHN |
| Elmer Myers | BOS | -0.88 | 192106100_BAL_BOS |
| Hooks Dauss | DET | -0.79 | 192106100_DET_MIN |
Based on accumulated WAA for this season up to 1921-06-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.88 | Carl Mays | 120.7 | NYA |
| +003+ | 4.93 | Red Faber | 121.3 | CHA |
| +007+ | 4.15 | Sad Sam Jones | 109 | BOS |
| +008+ | 3.94 | George Mogridge | 85 | MIN |
| +011+ | 3.61 | Stan Coveleski | 119.7 | CLE |
| +013+ | 3.36 | Eppa Rixey | 99.3 | CIN |
| +016+ | 3.01 | Whitey Glazner | 83.7 | PIT |
| +017+ | 3 | Rube Benton | 50.3 | SFN |
| +018+ | 2.77 | Burleigh Grimes | 77 | LAN |
| +020+ | 2.71 | Dolf Luque | 110 | CIN |
| +022+ | 2.6 | Fred Toney | 87.3 | SFN |
| +023+ | 2.57 | Jesse Barnes | 82.7 | SFN |
| +024+ | 2.52 | Herb Pennock | 73.7 | BOS |
| +029+ | 2.2 | Earl Hamilton | 90.7 | PIT |
| +032+ | 1.98 | Dana Fillingim | 76.3 | ATL |
| +033+ | 1.95 | Wilbur Cooper | 97 | PIT |
| +035+ | 1.89 | Hugh McQuillan | 91 | ATL |
| +041+ | 1.65 | Jimmy Zinn | 46.7 | PIT |
| +046+ | 1.61 | Bill Pertica | 74 | SLN |
| +049+ | 1.55 | Sherry Smith | 84 | LAN |
| +050+ | 1.53 | Red Causey | 41.7 | PHI |
| +057+ | 1.29 | Roy Moore | 55.7 | OAK |
| XXXXX | 1.14 | Rube Marquard | 91.7 | CIN |
| XXXXX | 1.07 | Hooks Dauss | 78 | DET |
| XXXXX | 1.03 | Dutch Ruether | 91.7 | LAN |
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