| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 10.06 | 192106100_CLE_NYA |
| Fred Toney | SFN | 4.19 | 192106100_SFN_CIN |
| Dutch Ruether | LAN | 3.52 | 192106100_LAN_SLN |
| Wilbur Cooper | PIT | 2.75 | 192106090_ATL_PIT |
| Red Faber | CHA | 2.54 | 192106080_CHA_OAK |
| 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 |
| Slim Harriss | OAK | -1.13 | 192106080_CHA_OAK |
| Elmer Myers | BOS | -0.88 | 192106100_BAL_BOS |
Based on accumulated WAA for this season up to 1921-06-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.92 | Carl Mays | 120.7 | NYA |
| +004+ | 4.88 | Red Faber | 120.7 | CHA |
| +007+ | 4.2 | Sad Sam Jones | 109 | BOS |
| +008+ | 3.97 | George Mogridge | 85 | MIN |
| +012+ | 3.39 | Eppa Rixey | 99.3 | CIN |
| +015+ | 3.04 | Whitey Glazner | 83.7 | PIT |
| +016+ | 3 | Stan Coveleski | 110.7 | CLE |
| +017+ | 2.91 | Rube Benton | 49.3 | SFN |
| +019+ | 2.78 | Burleigh Grimes | 77 | LAN |
| +021+ | 2.61 | Fred Toney | 87.3 | SFN |
| +022+ | 2.58 | Jesse Barnes | 82.7 | SFN |
| +026+ | 2.23 | Earl Hamilton | 90.7 | PIT |
| +029+ | 1.98 | Wilbur Cooper | 97 | PIT |
| +028+ | 1.98 | Dana Fillingim | 76.3 | ATL |
| +030+ | 1.9 | Hugh McQuillan | 91 | ATL |
| +032+ | 1.88 | Dolf Luque | 101 | CIN |
| +033+ | 1.86 | Herb Pennock | 64.7 | BOS |
| +040+ | 1.66 | Jimmy Zinn | 46.7 | PIT |
| +044+ | 1.64 | Bill Pertica | 74 | SLN |
| +049+ | 1.53 | Red Causey | 41.7 | PHI |
| +050+ | 1.52 | Sherry Smith | 77 | LAN |
| +057+ | 1.31 | Roy Moore | 55.7 | OAK |
| XXXXX | 1.17 | Rube Marquard | 91.7 | CIN |
| XXXXX | 1.08 | Hooks Dauss | 78 | DET |
| XXXXX | 1.04 | Dutch Ruether | 91.7 | LAN |
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