| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jesse Barnes | SFN | 7.4 | 192107032_ATL_SFN |
| Burleigh Grimes | LAN | 3.38 | 192107022_LAN_PHI |
| Red Faber | CHA | 3.36 | 192107030_CHA_BAL |
| Stan Coveleski | CLE | 2.94 | 192107030_DET_CLE |
| Babe Adams | PIT | 2.84 | 192107020_CIN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rollie Naylor | OAK | -2.23 | 192107020_OAK_MIN |
| Howard Ehmke | DET | -1.92 | 192107020_DET_CLE |
| Bill Bayne | BAL | -1.75 | 192107021_CHA_BAL |
| Doug McWeeny | CHA | -1.48 | 192107022_CHA_BAL |
| Harry Courtney | MIN | -1.22 | 192107020_OAK_MIN |
Based on accumulated WAA for this season up to 1921-07-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 6.24 | Carl Mays | 153.7 | NYA |
| +005+ | 6.1 | Red Faber | 172.7 | CHA |
| +007+ | 5.9 | Eppa Rixey | 135.3 | CIN |
| +008+ | 5.22 | George Mogridge | 132 | MIN |
| +010+ | 4.54 | Burleigh Grimes | 115 | LAN |
| +011+ | 4.36 | Jesse Barnes | 120.7 | SFN |
| +012+ | 3.86 | Wilbur Cooper | 142 | PIT |
| +022+ | 2.76 | Bill Piercy | 63.3 | NYA |
| +023+ | 2.72 | Stan Coveleski | 161.7 | CLE |
| +024+ | 2.62 | Fred Toney | 115.7 | SFN |
| +026+ | 2.41 | Rube Marquard | 129.7 | CIN |
| +028+ | 2.4 | Dolf Luque | 140.3 | CIN |
| +029+ | 2.37 | Bill Doak | 87.3 | SLN |
| +035+ | 2.21 | Babe Adams | 86.3 | PIT |
| +034+ | 2.21 | Herb Pennock | 104.7 | BOS |
| +038+ | 2.15 | Dana Fillingim | 103.7 | ATL |
| +039+ | 2.15 | Hugh McQuillan | 130 | ATL |
| +042+ | 2.04 | Rube Benton | 64.3 | SFN |
| +043+ | 2.02 | Earl Hamilton | 124.7 | PIT |
| +057+ | 1.56 | Allen Russell | 89.7 | BOS |
| +061+ | 1.49 | Johnny Miljus | 48.3 | LAN |
| +063+ | 1.46 | Johnny Morrison | 29 | PIT |
| +064+ | 1.45 | Bob Shawkey | 86.7 | NYA |
| +065+ | 1.42 | Roy Moore | 91 | OAK |
| +066+ | 1.39 | Joe Oeschger | 124.3 | ATL |
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