| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 8.5 | 192106292_BOS_NYA |
| Red Faber | CHA | 4.75 | 192106290_CHA_BAL |
| Wilbur Cooper | PIT | 3.89 | 192106290_PIT_CHN |
| Fred Toney | SFN | 3.76 | 192106290_SFN_ATL |
| Stan Coveleski | CLE | 3.62 | 192106280_BAL_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dutch Leonard | DET | -1.18 | 192106290_DET_CLE |
| Speed Martin | CHN | -1.18 | 192106281_PIT_CHN |
| Dixie Davis | BAL | -0.76 | 192106290_CHA_BAL |
| Bill Hubbell | PHI | -0.64 | 192106270_SFN_PHI |
| Elmer Myers | BOS | -0.48 | 192106280_OAK_BOS |
Based on accumulated WAA for this season up to 1921-06-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.3 | Carl Mays | 153.7 | NYA |
| +005+ | 5.43 | Red Faber | 163.7 | CHA |
| +007+ | 5.31 | Eppa Rixey | 129.3 | CIN |
| +009+ | 4.34 | Burleigh Grimes | 106 | LAN |
| +010+ | 4.17 | George Mogridge | 120 | MIN |
| +012+ | 3.87 | Wilbur Cooper | 142 | PIT |
| +020+ | 3.17 | Whitey Glazner | 110 | PIT |
| +022+ | 3.03 | Earl Hamilton | 119.7 | PIT |
| +023+ | 3.02 | Stan Coveleski | 153.3 | CLE |
| +024+ | 2.9 | Dana Fillingim | 98.3 | ATL |
| +025+ | 2.8 | Dolf Luque | 133.7 | CIN |
| +026+ | 2.79 | Bill Piercy | 63.3 | NYA |
| +027+ | 2.66 | Fred Toney | 115.7 | SFN |
| +034+ | 2.23 | Herb Pennock | 104.7 | BOS |
| +040+ | 1.97 | Rube Benton | 63.3 | SFN |
| +041+ | 1.94 | Rube Marquard | 120.7 | CIN |
| +042+ | 1.93 | Bill Doak | 78.3 | SLN |
| +051+ | 1.62 | Allen Russell | 81.7 | BOS |
| +060+ | 1.48 | Bob Shawkey | 86.7 | NYA |
| +062+ | 1.41 | Dave Keefe | 94.7 | OAK |
| +063+ | 1.4 | Joe Oeschger | 124.3 | ATL |
| +064+ | 1.38 | Hugh McQuillan | 122 | ATL |
| +066+ | 1.37 | Babe Adams | 77.3 | PIT |
| +069+ | 1.33 | Bullet Joe Bush | 83 | BOS |
| +071+ | 1.3 | Roy Walker | 74 | SLN |
_