| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Toney | SFN | 5.09 | 192106180_SFN_CHN |
| Red Faber | CHA | 4.09 | 192106180_CHA_NYA |
| Pete Alexander | CHN | 3.16 | 192106160_SFN_CHN |
| Wilbur Cooper | PIT | 2.99 | 192106180_LAN_PIT |
| Dutch Ruether | LAN | 2.1 | 192106180_LAN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Wilkinson | CHA | -2.25 | 192106160_CHA_NYA |
| Bernie Boland | BAL | -2.12 | 192106170_BAL_MIN |
| Rollie Naylor | OAK | -1.81 | 192106160_CLE_OAK |
| Howard Ehmke | DET | -1.34 | 192106172_DET_BOS |
| Tom Zachary | MIN | -0.78 | 192106180_BAL_MIN |
Based on accumulated WAA for this season up to 1921-06-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.69 | Red Faber | 139.3 | CHA |
| +006+ | 4.98 | George Mogridge | 103 | MIN |
| +008+ | 4.12 | Stan Coveleski | 133.7 | CLE |
| +011+ | 3.99 | Eppa Rixey | 108.3 | CIN |
| +013+ | 3.58 | Dolf Luque | 119 | CIN |
| +016+ | 3.29 | Burleigh Grimes | 88 | LAN |
| +018+ | 3.04 | Whitey Glazner | 94.7 | PIT |
| +019+ | 2.92 | Sad Sam Jones | 124.7 | BOS |
| +021+ | 2.77 | Herb Pennock | 83.7 | BOS |
| +022+ | 2.72 | Dana Fillingim | 85.7 | ATL |
| +023+ | 2.67 | Rube Benton | 57.3 | SFN |
| +024+ | 2.51 | Fred Toney | 98.7 | SFN |
| +029+ | 2.31 | Earl Hamilton | 104.7 | PIT |
| +031+ | 2.16 | Wilbur Cooper | 112 | PIT |
| +035+ | 1.98 | Jimmy Zinn | 56.7 | PIT |
| +036+ | 1.94 | Bill Pertica | 90 | SLN |
| +054+ | 1.52 | Rube Marquard | 106.7 | CIN |
| +056+ | 1.49 | Bob Shawkey | 62.7 | NYA |
| +061+ | 1.37 | Joe Oeschger | 98 | ATL |
| +062+ | 1.36 | Sherry Smith | 92 | LAN |
| +065+ | 1.33 | Phil Douglas | 63 | SFN |
| XXXXX | 1.23 | George Uhle | 114.7 | CLE |
| XXXXX | 1.19 | Babe Adams | 68.3 | PIT |
| XXXXX | 1.17 | Bill Doak | 52.3 | SLN |
| XXXXX | 1.1 | Lynn Brenton | 43 | CIN |
_