| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 9.39 | 192105281_OAK_NYA |
| Jesse Barnes | SFN | 5.67 | 192105270_SFN_ATL |
| Pete Alexander | CHN | 4.06 | 192105270_SLN_CHN |
| Wilbur Cooper | PIT | 4.04 | 192105270_CIN_PIT |
| Dutch Ruether | LAN | 3.86 | 192105280_LAN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Erickson | MIN | -2.98 | 192105290_BOS_MIN |
| Dutch Leonard | DET | -2.57 | 192105270_CHA_DET |
| Roy Wilkinson | CHA | -2.49 | 192105290_CHA_DET |
| Slim Harriss | OAK | -1.35 | 192105281_OAK_NYA |
| Ferdie Schupp | SLN | -1.04 | 192105281_SLN_CHN |
Based on accumulated WAA for this season up to 1921-05-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.26 | Carl Mays | 95 | NYA |
| +002+ | 4.74 | Red Faber | 92.7 | CHA |
| +005+ | 3.75 | Stan Coveleski | 93 | CLE |
| +012+ | 2.66 | Whitey Glazner | 63.7 | PIT |
| +013+ | 2.58 | Eppa Rixey | 75.7 | CIN |
| +014+ | 2.57 | George Mogridge | 59 | MIN |
| +016+ | 2.39 | Jesse Barnes | 68 | SFN |
| +017+ | 2.36 | Sad Sam Jones | 82 | BOS |
| +019+ | 2.25 | Wilbur Cooper | 73 | PIT |
| +020+ | 2.18 | Dana Fillingim | 57.7 | ATL |
| +022+ | 2.15 | Rube Benton | 36.3 | SFN |
| +026+ | 1.72 | Burleigh Grimes | 59 | LAN |
| +029+ | 1.67 | Waite Hoyt | 67.7 | NYA |
| +033+ | 1.62 | Earl Hamilton | 70.7 | PIT |
| +038+ | 1.4 | Dutch Ruether | 69 | LAN |
| XXXXX | 1.19 | Marv Goodwin | 16.7 | SLN |
| XXXXX | 1.18 | Herb Pennock | 50.7 | BOS |
| XXXXX | 1.13 | Jimmy Ring | 74 | PHI |
| XXXXX | 1.11 | Bill Pertica | 55 | SLN |
| XXXXX | 1.07 | Hugh McQuillan | 66 | ATL |
| XXXXX | 0.88 | Sherry Smith | 68 | LAN |
| XXXXX | 0.88 | Dolf Luque | 82 | CIN |
| XXXXX | 0.84 | Phil Douglas | 31.3 | SFN |
| XXXXX | 0.77 | Mule Watson | 67.3 | ATL |
| XXXXX | 0.76 | Roy Moore | 46.7 | OAK |
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