| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 9.39 | 192105281_OAK_NYA |
| Stan Coveleski | CLE | 5.64 | 192105301_CLE_DET |
| Babe Adams | PIT | 4.03 | 192105302_CHN_PIT |
| Dutch Ruether | LAN | 3.86 | 192105280_LAN_PHI |
| Fred Toney | SFN | 2.87 | 192105301_PHI_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Erickson | MIN | -2.98 | 192105290_BOS_MIN |
| Roy Wilkinson | CHA | -2.49 | 192105290_CHA_DET |
| Jack Scott | ATL | -1.87 | 192105301_LAN_ATL |
| 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 1921-05-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.36 | Carl Mays | 95 | NYA |
| +002+ | 4.61 | Red Faber | 101.7 | CHA |
| +007+ | 3.63 | Stan Coveleski | 102 | CLE |
| +008+ | 3.46 | George Mogridge | 68 | MIN |
| +014+ | 2.71 | Whitey Glazner | 63.7 | PIT |
| +015+ | 2.63 | Eppa Rixey | 75.7 | CIN |
| +016+ | 2.45 | Sad Sam Jones | 82 | BOS |
| +018+ | 2.44 | Jesse Barnes | 68 | SFN |
| +019+ | 2.31 | Wilbur Cooper | 73 | PIT |
| +021+ | 2.12 | Dana Fillingim | 57.7 | ATL |
| +027+ | 1.74 | Waite Hoyt | 67.7 | NYA |
| +031+ | 1.69 | Jimmy Zinn | 34.3 | PIT |
| +032+ | 1.68 | Burleigh Grimes | 59 | LAN |
| +033+ | 1.68 | Earl Hamilton | 70.7 | PIT |
| +036+ | 1.64 | Hugh McQuillan | 80 | ATL |
| +038+ | 1.59 | Fred Toney | 72.3 | SFN |
| +041+ | 1.35 | Dutch Ruether | 69 | LAN |
| XXXXX | 1.24 | Herb Pennock | 50.7 | BOS |
| XXXXX | 1.23 | Jimmy Ring | 74 | PHI |
| XXXXX | 1.2 | Marv Goodwin | 16.7 | SLN |
| XXXXX | 0.93 | Dolf Luque | 82 | CIN |
| XXXXX | 0.92 | Clarence Mitchell | 44 | LAN |
| XXXXX | 0.84 | Sherry Smith | 68 | LAN |
| XXXXX | 0.82 | Bill Pertica | 56 | SLN |
| XXXXX | 0.79 | Roy Moore | 46.7 | OAK |
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