| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Faber | CHA | 9.52 | 192107302_CHA_OAK |
| Eppa Rixey | CIN | 6.91 | 192107311_SFN_CIN |
| Carl Mays | NYA | 4.85 | 192107310_CLE_NYA |
| Pete Alexander | CHN | 4.36 | 192107301_PHI_CHN |
| Jesse Barnes | SFN | 3.77 | 192107302_SFN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dickey Kerr | CHA | -1.82 | 192107301_CHA_OAK |
| Howard Ehmke | DET | -1.18 | 192107290_DET_OAK |
| Lefty York | CHN | -0.98 | 192107290_PHI_CHN |
| Bob Hasty | OAK | -0.82 | 192107290_DET_OAK |
| Bill Hubbell | PHI | -0.68 | 192107290_PHI_CHN |
Based on accumulated WAA for this season up to 1921-07-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.6 | Red Faber | 240.7 | CHA |
| +003+ | 9.77 | Eppa Rixey | 200 | CIN |
| +010+ | 5.5 | Carl Mays | 212 | NYA |
| +012+ | 5.24 | George Mogridge | 183.3 | MIN |
| +013+ | 5.24 | Jesse Barnes | 162 | SFN |
| +017+ | 4.37 | Wilbur Cooper | 208 | PIT |
| +018+ | 3.92 | Burleigh Grimes | 174 | LAN |
| +020+ | 3.87 | Pete Alexander | 148 | CHN |
| +021+ | 3.86 | Sad Sam Jones | 193 | BOS |
| +023+ | 3.53 | Bill Doak | 125.7 | SLN |
| +025+ | 3.41 | Whitey Glazner | 154 | PIT |
| +028+ | 3.31 | Waite Hoyt | 168.7 | NYA |
| +027+ | 3.31 | Joe Oeschger | 184 | ATL |
| +030+ | 3.28 | Babe Adams | 111.3 | PIT |
| +031+ | 3.27 | Hugh McQuillan | 172.3 | ATL |
| +032+ | 3.22 | Stan Coveleski | 214.7 | CLE |
| +034+ | 2.78 | Dana Fillingim | 142.3 | ATL |
| +035+ | 2.7 | Dolf Luque | 192 | CIN |
| +039+ | 2.33 | Guy Morton | 53.7 | CLE |
| +040+ | 2.3 | Bullet Joe Bush | 139.7 | BOS |
| +050+ | 1.97 | Jack Scott | 142.7 | ATL |
| +057+ | 1.8 | Herb Pennock | 141 | BOS |
| +060+ | 1.67 | Bill Pertica | 137 | SLN |
| +065+ | 1.61 | Earl Hamilton | 152.7 | PIT |
| +067+ | 1.55 | Jesse Haines | 149 | SLN |
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