| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 8.22 | 192106200_NYA_BOS |
| 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 |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Hasty | OAK | -2.24 | 192106202_MIN_OAK |
| Stan Baumgartner | PHI | -1.76 | 192106190_PHI_CIN |
| Dutch Leonard | DET | -1.74 | 192106190_DET_CLE |
| Bill Bayne | BAL | -1.26 | 192106180_BAL_MIN |
| Harry Courtney | MIN | -0.87 | 192106202_MIN_OAK |
Based on accumulated WAA for this season up to 1921-06-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.63 | Red Faber | 139.3 | CHA |
| +004+ | 5.5 | Carl Mays | 134.7 | NYA |
| +006+ | 4.94 | George Mogridge | 103 | MIN |
| +008+ | 4.2 | Jesse Barnes | 105.7 | SFN |
| +011+ | 3.95 | Eppa Rixey | 108.3 | CIN |
| +013+ | 3.62 | Stan Coveleski | 137.7 | CLE |
| +015+ | 3.36 | Dolf Luque | 128 | CIN |
| +016+ | 3.25 | Burleigh Grimes | 88 | LAN |
| +017+ | 3.01 | Whitey Glazner | 94.7 | PIT |
| +019+ | 2.85 | Bill Piercy | 55.3 | NYA |
| +020+ | 2.84 | Sad Sam Jones | 124.7 | BOS |
| +022+ | 2.72 | Herb Pennock | 83.7 | BOS |
| +023+ | 2.7 | Dana Fillingim | 85.7 | ATL |
| +024+ | 2.65 | Rube Benton | 57.3 | SFN |
| +027+ | 2.47 | Fred Toney | 98.7 | SFN |
| +029+ | 2.27 | Earl Hamilton | 104.7 | PIT |
| +032+ | 2.12 | Wilbur Cooper | 112 | PIT |
| +035+ | 2.06 | Jimmy Zinn | 57.7 | PIT |
| +038+ | 1.91 | Bill Pertica | 90 | SLN |
| +054+ | 1.51 | Bill Doak | 60.3 | SLN |
| +057+ | 1.47 | Rube Marquard | 106.7 | CIN |
| +058+ | 1.46 | Bob Shawkey | 62.7 | NYA |
| +061+ | 1.33 | Sherry Smith | 92 | LAN |
| +063+ | 1.31 | Phil Douglas | 63 | SFN |
| XXXXX | 1.21 | Chief Yellow Horse | 26.3 | PIT |
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