| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 10.06 | 192106100_CLE_NYA |
| Fred Toney | SFN | 4.19 | 192106100_SFN_CIN |
| Stan Coveleski | CLE | 3.88 | 192106110_CLE_MIN |
| Dutch Ruether | LAN | 3.52 | 192106100_LAN_SLN |
| Babe Adams | PIT | 3.09 | 192106110_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dickey Kerr | CHA | -1.96 | 192106100_CHA_OAK |
| Elmer Myers | BOS | -0.88 | 192106100_BAL_BOS |
| Hooks Dauss | DET | -0.79 | 192106100_DET_MIN |
| Ferdie Schupp | SLN | -0.78 | 192106110_SFN_SLN |
| Harry Courtney | MIN | -0.66 | 192106100_DET_MIN |
Based on accumulated WAA for this season up to 1921-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.93 | Carl Mays | 120.7 | NYA |
| +005+ | 4.98 | Red Faber | 121.3 | CHA |
| +006+ | 4.63 | George Mogridge | 94 | MIN |
| +008+ | 4.2 | Sad Sam Jones | 109 | BOS |
| +010+ | 3.69 | Stan Coveleski | 119.7 | CLE |
| +013+ | 3.4 | Eppa Rixey | 99.3 | CIN |
| +015+ | 3.05 | Whitey Glazner | 83.7 | PIT |
| +016+ | 3.02 | Rube Benton | 50.3 | SFN |
| +018+ | 2.87 | Jesse Barnes | 89.7 | SFN |
| +020+ | 2.82 | Burleigh Grimes | 77 | LAN |
| +021+ | 2.76 | Dolf Luque | 110 | CIN |
| +022+ | 2.71 | Fred Toney | 88 | SFN |
| +023+ | 2.55 | Herb Pennock | 73.7 | BOS |
| +029+ | 2.24 | Earl Hamilton | 90.7 | PIT |
| +031+ | 1.99 | Wilbur Cooper | 97 | PIT |
| +034+ | 1.89 | Bill Pertica | 83 | SLN |
| +037+ | 1.85 | Rube Marquard | 100.7 | CIN |
| +038+ | 1.81 | Dana Fillingim | 76.7 | ATL |
| +041+ | 1.66 | Jimmy Zinn | 46.7 | PIT |
| +047+ | 1.6 | Sherry Smith | 84 | LAN |
| +049+ | 1.55 | Red Causey | 41.7 | PHI |
| +058+ | 1.31 | Roy Moore | 55.7 | OAK |
| XXXXX | 1.17 | Bob Shawkey | 53.7 | NYA |
| XXXXX | 1.12 | Hooks Dauss | 78 | DET |
| XXXXX | 1.11 | Hugh McQuillan | 98 | ATL |
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