| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stan Coveleski | CLE | 4.52 | 192106070_CLE_NYA |
| Wilbur Cooper | PIT | 2.75 | 192106090_ATL_PIT |
| Red Faber | CHA | 2.54 | 192106080_CHA_OAK |
| Rube Benton | SFN | 1.45 | 192106070_SFN_CIN |
| Bob Shawkey | NYA | 0.94 | 192106070_CLE_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Caldwell | CLE | -2.36 | 192106090_CLE_NYA |
| Dutch Leonard | DET | -1.58 | 192106070_DET_MIN |
| George Smith | PHI | -1.17 | 192106090_PHI_CHN |
| Slim Harriss | OAK | -1.13 | 192106080_CHA_OAK |
| Tom Zachary | MIN | -0.87 | 192106070_DET_MIN |
Based on accumulated WAA for this season up to 1921-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.29 | Carl Mays | 112.7 | NYA |
| +004+ | 4.93 | Red Faber | 120.7 | CHA |
| +005+ | 4.25 | Sad Sam Jones | 109 | BOS |
| +008+ | 4 | George Mogridge | 85 | MIN |
| +013+ | 3.08 | Stan Coveleski | 110.7 | CLE |
| +014+ | 3.03 | Whitey Glazner | 76.7 | PIT |
| +015+ | 2.91 | Rube Benton | 49.3 | SFN |
| +019+ | 2.79 | Burleigh Grimes | 77 | LAN |
| +020+ | 2.76 | Eppa Rixey | 90.3 | CIN |
| +021+ | 2.59 | Jesse Barnes | 82.7 | SFN |
| +022+ | 2.46 | Fred Toney | 81.3 | SFN |
| +024+ | 2.25 | Earl Hamilton | 90.7 | PIT |
| +027+ | 2.01 | Wilbur Cooper | 97 | PIT |
| +028+ | 2 | Dana Fillingim | 76.3 | ATL |
| +031+ | 1.93 | Hugh McQuillan | 91 | ATL |
| +032+ | 1.91 | Dolf Luque | 101 | CIN |
| +033+ | 1.89 | Herb Pennock | 64.7 | BOS |
| +041+ | 1.67 | Jimmy Zinn | 46.7 | PIT |
| +042+ | 1.66 | Bill Pertica | 74 | SLN |
| +044+ | 1.65 | Dutch Ruether | 87 | LAN |
| +047+ | 1.55 | Red Causey | 41.7 | PHI |
| +048+ | 1.53 | Sherry Smith | 77 | LAN |
| +054+ | 1.32 | Roy Moore | 55.7 | OAK |
| XXXXX | 1.21 | Rube Marquard | 91.7 | CIN |
| XXXXX | 1.08 | Bob Shawkey | 43.7 | NYA |
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