| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Toney | SFN | 4.14 | 192106140_SFN_SLN |
| Dutch Ruether | LAN | 2.64 | 192106120_LAN_CIN |
| Red Faber | CHA | 2.6 | 192106130_CHA_BOS |
| Bob Shawkey | NYA | 1.17 | 192106120_DET_NYA |
| George Mogridge | MIN | 0.45 | 192106120_CLE_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Erickson | MIN | -2.33 | 192106130_CLE_MIN |
| Ray Caldwell | CLE | -2.25 | 192106130_CLE_MIN |
| Stan Baumgartner | PHI | -1.54 | 192106130_PHI_PIT |
| Slim Harriss | OAK | -1.17 | 192106130_BAL_OAK |
| Doug McWeeny | CHA | -0.72 | 192106140_CHA_BOS |
Based on accumulated WAA for this season up to 1921-06-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.64 | Carl Mays | 122.7 | NYA |
| +004+ | 5.39 | Red Faber | 130.3 | CHA |
| +006+ | 4.71 | George Mogridge | 94 | MIN |
| +010+ | 4.1 | Stan Coveleski | 122.7 | CLE |
| +011+ | 3.98 | Eppa Rixey | 108.3 | CIN |
| +015+ | 3.16 | Whitey Glazner | 83.7 | PIT |
| +016+ | 3.09 | Rube Benton | 50.3 | SFN |
| +017+ | 3.09 | Fred Toney | 97 | SFN |
| +018+ | 2.99 | Jesse Barnes | 89.7 | SFN |
| +019+ | 2.93 | Burleigh Grimes | 77 | LAN |
| +021+ | 2.89 | Dolf Luque | 110 | CIN |
| +020+ | 2.89 | Sad Sam Jones | 115.7 | BOS |
| +022+ | 2.79 | Earl Hamilton | 99.7 | PIT |
| +025+ | 2.63 | Herb Pennock | 73.7 | BOS |
| +031+ | 2.12 | Wilbur Cooper | 97 | PIT |
| +032+ | 1.99 | Bill Pertica | 83 | SLN |
| +033+ | 1.97 | Rube Marquard | 100.7 | CIN |
| +034+ | 1.95 | Jimmy Zinn | 55.7 | PIT |
| +038+ | 1.93 | Dana Fillingim | 76.7 | ATL |
| +045+ | 1.72 | Sherry Smith | 84 | LAN |
| +050+ | 1.61 | Red Causey | 41.7 | PHI |
| +061+ | 1.25 | Hugh McQuillan | 98 | ATL |
| XXXXX | 1.24 | Bob Shawkey | 53.7 | NYA |
| XXXXX | 1.14 | Jesse Haines | 91.3 | SLN |
| XXXXX | 1.02 | Dave Keefe | 76 | OAK |
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