| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 10.12 | 192106050_BAL_NYA |
| Stan Coveleski | CLE | 5.45 | 192106030_CLE_BOS |
| Wilbur Cooper | PIT | 4.13 | 192106040_SFN_PIT |
| Fred Toney | SFN | 3.31 | 192106030_SFN_PIT |
| Pete Alexander | CHN | 2.61 | 192106040_LAN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Shovel Hodge | CHA | -2.89 | 192106050_CHA_MIN |
| Rollie Naylor | OAK | -1.94 | 192106030_DET_OAK |
| Bernie Boland | BAL | -1.43 | 192106040_BAL_NYA |
| Dutch Leonard | DET | -1.4 | 192106030_DET_OAK |
| Jose Acosta | MIN | -0.8 | 192106040_CHA_MIN |
Based on accumulated WAA for this season up to 1921-06-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.12 | Carl Mays | 112.7 | NYA |
| +002+ | 5.02 | Red Faber | 110.7 | CHA |
| +007+ | 3.65 | Sad Sam Jones | 100 | BOS |
| +008+ | 3.56 | Stan Coveleski | 107 | CLE |
| +010+ | 3.45 | George Mogridge | 76 | MIN |
| +011+ | 3.37 | Whitey Glazner | 72.7 | PIT |
| +014+ | 3.07 | Rube Benton | 45.3 | SFN |
| +018+ | 2.62 | Burleigh Grimes | 77 | LAN |
| +017+ | 2.62 | Eppa Rixey | 90.3 | CIN |
| +019+ | 2.6 | Hugh McQuillan | 89 | ATL |
| +022+ | 2.31 | Fred Toney | 81.3 | SFN |
| +025+ | 2.13 | Dana Fillingim | 70.3 | ATL |
| +028+ | 2.03 | Herb Pennock | 62.7 | BOS |
| +029+ | 1.97 | Jimmy Zinn | 41.7 | PIT |
| +031+ | 1.9 | Earl Hamilton | 81.7 | PIT |
| +035+ | 1.76 | Dolf Luque | 101 | CIN |
| +042+ | 1.64 | Wilbur Cooper | 88 | PIT |
| +046+ | 1.56 | Rosy Ryan | 49.3 | SFN |
| +047+ | 1.46 | Dutch Ruether | 78 | LAN |
| +051+ | 1.36 | Sherry Smith | 77 | LAN |
| XXXXX | 0.99 | Clarence Mitchell | 44 | LAN |
| XXXXX | 0.89 | Phil Douglas | 46.7 | SFN |
| XXXXX | 0.78 | Dave Keefe | 59.7 | OAK |
| XXXXX | 0.71 | Marv Goodwin | 18 | SLN |
| XXXXX | 0.71 | Jim Middleton | 50.3 | DET |
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