| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Mays | NYA | 5.74 | 192109071_BOS_NYA |
| George Mogridge | MIN | 5.33 | 192109090_BOS_MIN |
| Sad Sam Jones | BOS | 3.83 | 192109090_BOS_MIN |
| Joe Oeschger | ATL | 1.62 | 192109081_PHI_ATL |
| Wilbur Cooper | PIT | 1.54 | 192109090_CHN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dixie Davis | BAL | -3.84 | 192109070_CHA_BAL |
| Roy Wilkinson | CHA | -2.92 | 192109080_CHA_BAL |
| Rip Collins | NYA | -1.5 | 192109080_NYA_OAK |
| Jim Bagby | CLE | -1.21 | 192109070_DET_CLE |
| Rollie Naylor | OAK | -1.11 | 192109090_NYA_OAK |
Based on accumulated WAA for this season up to 1921-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 9.31 | Eppa Rixey | 262.7 | CIN |
| +008+ | 7.97 | Carl Mays | 291.3 | NYA |
| +009+ | 7.93 | George Mogridge | 262.7 | MIN |
| +013+ | 6.92 | Burleigh Grimes | 253.3 | LAN |
| +015+ | 6.44 | Bill Doak | 182.7 | SLN |
| +016+ | 6.4 | Sad Sam Jones | 271.7 | BOS |
| +017+ | 6.27 | Jesse Barnes | 231.3 | SFN |
| +022+ | 5.03 | Waite Hoyt | 238.3 | NYA |
| +023+ | 4.72 | Whitey Glazner | 207.7 | PIT |
| +024+ | 4.56 | Stan Coveleski | 272 | CLE |
| +026+ | 4.36 | Dana Fillingim | 206.3 | ATL |
| +027+ | 4.31 | Joe Oeschger | 268.7 | ATL |
| +028+ | 4.13 | Pete Alexander | 213 | CHN |
| +029+ | 3.97 | Wilbur Cooper | 286.7 | PIT |
| +033+ | 3.76 | Dolf Luque | 275 | CIN |
| +035+ | 3.7 | Bill Pertica | 187 | SLN |
| +037+ | 3.7 | Bill Sherdel | 114 | SLN |
| +042+ | 3.51 | Rube Marquard | 232.7 | CIN |
| +045+ | 2.92 | Benn Karr | 72.3 | BOS |
| +050+ | 2.43 | Earl Hamilton | 198.7 | PIT |
| +051+ | 2.41 | Clarence Mitchell | 151.3 | LAN |
| +057+ | 2.1 | Bullet Joe Bush | 202.3 | BOS |
| +063+ | 1.96 | Johnny Morrison | 104 | PIT |
| +070+ | 1.73 | Bob Shawkey | 214.7 | NYA |
| +072+ | 1.64 | Allen Russell | 158 | BOS |
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