| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 7.09 | 192106240_MIN_NYA |
| Red Faber | CHA | 4.95 | 192106250_DET_CHA |
| Stan Coveleski | CLE | 4.76 | 192106230_CLE_CHA |
| Wilbur Cooper | PIT | 4.14 | 192106252_PIT_SLN |
| Fred Toney | SFN | 3.9 | 192106230_ATL_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rollie Naylor | OAK | -2.11 | 192106251_OAK_BOS |
| Roy Wilkinson | CHA | -2 | 192106240_CLE_CHA |
| Howard Ehmke | DET | -1.91 | 192106250_DET_CHA |
| Stan Baumgartner | PHI | -1.13 | 192106240_SFN_PHI |
| Rip Collins | NYA | -1.02 | 192106230_NYA_BOS |
Based on accumulated WAA for this season up to 1921-06-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.78 | Carl Mays | 143.7 | NYA |
| +005+ | 5.38 | Red Faber | 154.3 | CHA |
| +008+ | 4.74 | George Mogridge | 113 | MIN |
| +009+ | 4.61 | Eppa Rixey | 120.3 | CIN |
| +012+ | 3.89 | Burleigh Grimes | 97 | LAN |
| +014+ | 3.4 | Herb Pennock | 101.7 | BOS |
| +017+ | 3.25 | Whitey Glazner | 104.7 | PIT |
| +018+ | 3.16 | Wilbur Cooper | 133 | PIT |
| +022+ | 3 | Stan Coveleski | 144.3 | CLE |
| +023+ | 2.8 | Bill Piercy | 63.3 | NYA |
| +024+ | 2.76 | Dolf Luque | 133.7 | CIN |
| +025+ | 2.62 | Earl Hamilton | 113.7 | PIT |
| +026+ | 2.53 | Dana Fillingim | 94.7 | ATL |
| +027+ | 2.48 | Fred Toney | 107.7 | SFN |
| +030+ | 2.36 | Sad Sam Jones | 131.3 | BOS |
| +038+ | 1.95 | Rube Benton | 63.3 | SFN |
| +041+ | 1.8 | Red Causey | 49.7 | PHI |
| +043+ | 1.69 | Bill Doak | 69.3 | SLN |
| +049+ | 1.64 | Jimmy Zinn | 62.7 | PIT |
| +053+ | 1.54 | Rube Marquard | 114.7 | CIN |
| +059+ | 1.49 | Bullet Joe Bush | 74 | BOS |
| +061+ | 1.45 | Allen Russell | 73.7 | BOS |
| +062+ | 1.44 | Hugh McQuillan | 114 | ATL |
| +064+ | 1.35 | Elam Vangilder | 37.3 | BAL |
| +066+ | 1.27 | Pete Alexander | 57 | CHN |
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