| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jesse Barnes | SFN | 5.67 | 192105270_SFN_ATL |
| Stan Coveleski | CLE | 5.62 | 192105260_CLE_BAL |
| Pete Alexander | CHN | 4.06 | 192105270_SLN_CHN |
| Wilbur Cooper | PIT | 4.04 | 192105270_CIN_PIT |
| Red Faber | CHA | 2.94 | 192105261_CHA_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dutch Leonard | DET | -2.57 | 192105270_CHA_DET |
| Roy Wilkinson | CHA | -1.67 | 192105250_MIN_CHA |
| Scott Perry | OAK | -1.23 | 192105250_OAK_DET |
| George Uhle | CLE | -0.88 | 192105250_BOS_CLE |
| Tom Zachary | MIN | -0.5 | 192105270_NYA_MIN |
Based on accumulated WAA for this season up to 1921-05-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.61 | Red Faber | 92.7 | CHA |
| +002+ | 4.56 | Carl Mays | 86 | NYA |
| +005+ | 3.67 | Stan Coveleski | 93 | CLE |
| +012+ | 2.56 | Whitey Glazner | 55.7 | PIT |
| +013+ | 2.38 | George Mogridge | 58 | MIN |
| +014+ | 2.28 | Eppa Rixey | 70 | CIN |
| +015+ | 2.26 | Wilbur Cooper | 73 | PIT |
| +017+ | 2.17 | Sad Sam Jones | 75 | BOS |
| +016+ | 2.17 | Rube Benton | 34.7 | SFN |
| +020+ | 2.1 | Dana Fillingim | 55 | ATL |
| +022+ | 2.05 | Jesse Barnes | 65 | SFN |
| +025+ | 1.67 | Burleigh Grimes | 59 | LAN |
| +027+ | 1.61 | Waite Hoyt | 67.7 | NYA |
| +034+ | 1.4 | Earl Hamilton | 63.7 | PIT |
| XXXXX | 1.09 | Bill Pertica | 55 | SLN |
| XXXXX | 1.09 | Herb Pennock | 50.7 | BOS |
| XXXXX | 1.03 | Lefty Tyler | 20 | CHN |
| XXXXX | 1.01 | Hugh McQuillan | 66 | ATL |
| XXXXX | 0.93 | Dutch Ruether | 60 | LAN |
| XXXXX | 0.87 | George Uhle | 67 | CLE |
| XXXXX | 0.81 | Phil Douglas | 31.3 | SFN |
| XXXXX | 0.77 | Rosy Ryan | 37.7 | SFN |
| XXXXX | 0.73 | Dave Keefe | 42.7 | OAK |
| XXXXX | 0.71 | Dolf Luque | 73.3 | CIN |
| XXXXX | 0.67 | Roy Moore | 46.7 | OAK |
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