| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 7.86 | 192105100_NYA_DET |
| Jesse Barnes | SFN | 4.91 | 192105120_SLN_SFN |
| Pete Alexander | CHN | 3.84 | 192105100_CHN_PHI |
| Stan Coveleski | CLE | 3.48 | 192105110_MIN_CLE |
| Dutch Ruether | LAN | 3.36 | 192105100_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Erickson | MIN | -2.4 | 192105120_MIN_CLE |
| Mule Watson | ATL | -1.67 | 192105120_PIT_ATL |
| Bullet Joe Bush | BOS | -1.25 | 192105100_BOS_CHA |
| Hooks Dauss | DET | -1.18 | 192105120_NYA_DET |
| Roy Moore | OAK | -0.81 | 192105110_OAK_BAL |
Based on accumulated WAA for this season up to 1921-05-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4 | Carl Mays | 65.3 | NYA |
| +002+ | 3.29 | Red Faber | 53 | CHA |
| +005+ | 2.67 | Stan Coveleski | 64 | CLE |
| +007+ | 2.48 | Whitey Glazner | 40.7 | PIT |
| +008+ | 2.35 | Bill Piercy | 44 | NYA |
| +009+ | 2.26 | Sad Sam Jones | 50 | BOS |
| +010+ | 2.24 | Fred Toney | 51 | SFN |
| +013+ | 1.89 | Jesse Barnes | 44.7 | SFN |
| +014+ | 1.87 | Wilbur Cooper | 36 | PIT |
| +016+ | 1.78 | Burleigh Grimes | 27 | LAN |
| +019+ | 1.61 | Eppa Rixey | 47.3 | CIN |
| +024+ | 1.35 | Dolf Luque | 56 | CIN |
| +025+ | 1.34 | Herb Pennock | 37.7 | BOS |
| XXXXX | 1.24 | Clarence Mitchell | 32.7 | LAN |
| XXXXX | 1.06 | Babe Adams | 36.3 | PIT |
| XXXXX | 0.99 | Jim Middleton | 30.3 | DET |
| XXXXX | 0.91 | Red Causey | 27 | PHI |
| XXXXX | 0.78 | Urban Shocker | 58.7 | BAL |
| XXXXX | 0.67 | Earl Hamilton | 46.3 | PIT |
| XXXXX | 0.66 | Hugh McQuillan | 43 | ATL |
| XXXXX | 0.66 | Dutch Ruether | 42.7 | LAN |
| XXXXX | 0.65 | George Mogridge | 25 | MIN |
| XXXXX | 0.6 | Suds Sutherland | 30.7 | DET |
| XXXXX | 0.59 | Rube Benton | 9 | SFN |
| XXXXX | 0.54 | Red Oldham | 32.3 | DET |
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