| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stan Coveleski | CLE | 5.24 | 192106150_CLE_OAK |
| Wilbur Cooper | PIT | 3.3 | 192106150_LAN_PIT |
| Pete Alexander | CHN | 3.16 | 192106160_SFN_CHN |
| Dolf Luque | CIN | 2 | 192106150_PHI_CIN |
| Rube Benton | SFN | 1.8 | 192106150_SFN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Hasty | OAK | -2.41 | 192106150_CLE_OAK |
| Roy Wilkinson | CHA | -2.25 | 192106160_CHA_NYA |
| Bernie Boland | BAL | -2.12 | 192106170_BAL_MIN |
| Howard Ehmke | DET | -1.34 | 192106172_DET_BOS |
| George Smith | PHI | -0.82 | 192106150_PHI_CIN |
Based on accumulated WAA for this season up to 1921-06-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.43 | Red Faber | 130.3 | CHA |
| +006+ | 4.97 | George Mogridge | 103 | MIN |
| +010+ | 4.09 | Stan Coveleski | 133.7 | CLE |
| +011+ | 3.99 | Eppa Rixey | 108.3 | CIN |
| +014+ | 3.57 | Dolf Luque | 119 | CIN |
| +017+ | 3.07 | Burleigh Grimes | 86 | LAN |
| +018+ | 3.03 | Whitey Glazner | 94.7 | PIT |
| +019+ | 2.99 | Fred Toney | 97 | SFN |
| +020+ | 2.86 | Sad Sam Jones | 115.7 | BOS |
| +021+ | 2.78 | Herb Pennock | 83.7 | BOS |
| +022+ | 2.71 | Dana Fillingim | 85.7 | ATL |
| +023+ | 2.68 | Rube Benton | 57.3 | SFN |
| +028+ | 2.29 | Earl Hamilton | 104.7 | PIT |
| +034+ | 1.98 | Jimmy Zinn | 56.7 | PIT |
| +035+ | 1.94 | Bill Pertica | 90 | SLN |
| +045+ | 1.72 | Wilbur Cooper | 103 | PIT |
| +055+ | 1.52 | Rube Marquard | 106.7 | CIN |
| +056+ | 1.49 | Bob Shawkey | 62.7 | NYA |
| +058+ | 1.37 | Joe Oeschger | 98 | ATL |
| +060+ | 1.34 | Sherry Smith | 92 | LAN |
| XXXXX | 1.2 | George Uhle | 114.7 | CLE |
| XXXXX | 1.18 | Babe Adams | 68.3 | PIT |
| XXXXX | 1.17 | Bill Doak | 52.3 | SLN |
| XXXXX | 1.1 | Lynn Brenton | 43 | CIN |
| XXXXX | 1.06 | Pete Alexander | 48 | CHN |
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