| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pete Alexander | CHN | 10.15 | 192009201_CHN_ATL |
| Wilbur Cooper | PIT | 4.01 | 192009190_PIT_LAN |
| Bob Shawkey | NYA | 3.17 | 192009180_NYA_CHA |
| Dolf Luque | CIN | 1.86 | 192009190_CIN_SFN |
| Jesse Barnes | SFN | 1.66 | 192009190_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Shaw | MIN | -3.21 | 192009192_MIN_DET |
| Bullet Joe Bush | BOS | -2.53 | 192009200_BOS_CLE |
| Lefty Williams | CHA | -2 | 192009190_OAK_CHA |
| Carl Weilman | BAL | -1.35 | 192009200_NYA_BAL |
| Hank Thormahlen | NYA | -0.97 | 192009190_NYA_BAL |
Based on accumulated WAA for this season up to 1920-09-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 11.41 | Pete Alexander | 337.3 | CHN |
| +006+ | 8.92 | Burleigh Grimes | 292.7 | LAN |
| +009+ | 7.22 | Wilbur Cooper | 306.7 | PIT |
| +010+ | 6.86 | Babe Adams | 249 | PIT |
| +013+ | 6.49 | Stan Coveleski | 291.3 | CLE |
| +014+ | 5.89 | Dutch Ruether | 258.7 | CIN |
| +018+ | 5.48 | Hippo Vaughn | 285 | CHN |
| +020+ | 5.28 | Bob Shawkey | 240.7 | NYA |
| +022+ | 4.66 | Bill Doak | 258 | SLN |
| +024+ | 4.54 | Leon Cadore | 250.3 | LAN |
| +026+ | 4.41 | Fred Toney | 262 | SFN |
| +028+ | 4.15 | Jesse Barnes | 280 | SFN |
| +031+ | 4.11 | Red Faber | 308 | CHA |
| +032+ | 4.11 | Dolf Luque | 199.3 | CIN |
| +033+ | 4.1 | Sherry Smith | 121.7 | LAN |
| +037+ | 3.7 | Jim Bagby | 308.7 | CLE |
| +040+ | 3.51 | Phil Douglas | 205.7 | SFN |
| +049+ | 2.52 | Carl Mays | 294 | NYA |
| +050+ | 2.51 | Elmer Ponder | 178 | PIT |
| +052+ | 2.48 | Dixie Davis | 245 | BAL |
| +053+ | 2.38 | Dana Fillingim | 247 | ATL |
| +055+ | 2.37 | Eddie Rommel | 158 | OAK |
| +057+ | 2.32 | Lee Meadows | 225.7 | PHI |
| +058+ | 2.31 | Ray Fisher | 184.7 | CIN |
| +059+ | 2.3 | Jack Quinn | 245.3 | NYA |
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