| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stan Coveleski | CLE | 5.21 | 192106190_DET_CLE |
| Jesse Barnes | SFN | 5.13 | 192106190_SFN_CHN |
| Red Faber | CHA | 4.09 | 192106180_CHA_NYA |
| Wilbur Cooper | PIT | 2.99 | 192106180_LAN_PIT |
| Dolf Luque | CIN | 2.57 | 192106190_PHI_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bernie Boland | BAL | -2.12 | 192106170_BAL_MIN |
| Stan Baumgartner | PHI | -1.76 | 192106190_PHI_CIN |
| Dutch Leonard | DET | -1.74 | 192106190_DET_CLE |
| Slim Harriss | OAK | -0.93 | 192106180_CLE_OAK |
| Tom Zachary | MIN | -0.78 | 192106180_BAL_MIN |
Based on accumulated WAA for this season up to 1921-06-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 5.67 | Red Faber | 139.3 | CHA |
| +006+ | 4.95 | George Mogridge | 103 | MIN |
| +008+ | 4.23 | Jesse Barnes | 105.7 | SFN |
| +011+ | 3.98 | Eppa Rixey | 108.3 | CIN |
| +013+ | 3.65 | Stan Coveleski | 137.7 | CLE |
| +015+ | 3.4 | Dolf Luque | 128 | CIN |
| +016+ | 3.28 | Burleigh Grimes | 88 | LAN |
| +017+ | 3.03 | Whitey Glazner | 94.7 | PIT |
| +018+ | 2.91 | Sad Sam Jones | 124.7 | BOS |
| +020+ | 2.87 | Bill Piercy | 55.3 | NYA |
| +022+ | 2.76 | Herb Pennock | 83.7 | BOS |
| +023+ | 2.72 | Dana Fillingim | 85.7 | ATL |
| +024+ | 2.66 | Rube Benton | 57.3 | SFN |
| +026+ | 2.5 | Fred Toney | 98.7 | SFN |
| +029+ | 2.29 | Earl Hamilton | 104.7 | PIT |
| +033+ | 2.14 | Wilbur Cooper | 112 | PIT |
| +035+ | 1.97 | Jimmy Zinn | 56.7 | PIT |
| +036+ | 1.93 | Bill Pertica | 90 | SLN |
| +054+ | 1.53 | Bill Doak | 60.3 | SLN |
| +056+ | 1.5 | Rube Marquard | 106.7 | CIN |
| +058+ | 1.49 | Bob Shawkey | 62.7 | NYA |
| +062+ | 1.35 | Sherry Smith | 92 | LAN |
| +064+ | 1.32 | Phil Douglas | 63 | SFN |
| XXXXX | 1.22 | George Uhle | 114.7 | CLE |
| XXXXX | 1.18 | Babe Adams | 68.3 | PIT |
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