| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago Cubs | CHN | 5.41 | 193105161_CHN_PHI |
| Philadelphia Athletics | OAK | 4.16 | 193105170_OAK_CLE |
| Brooklyn Robins | LAN | 2.77 | 193105170_CIN_LAN |
| Chicago White Sox | CHA | 1.59 | 193105160_BOS_CHA |
| Washington Senators | MIN | 1.2 | 193105171_MIN_BAL |
| Team | Tm | Tier | Game |
|---|---|---|---|
| St. Louis Browns | BAL | -5.56 | 193105160_MIN_BAL |
| Cincinnati Reds | CIN | -1.85 | 193105180_CIN_LAN |
| Pittsburgh Pirates | PIT | -1.15 | 193105160_PIT_ATL |
| Philadelphia Phillies | PHI | -1.11 | 193105180_CHN_PHI |
| Cleveland Indians | CLE | -0.99 | 193105170_OAK_CLE |
Based on accumulated WAA for this season up to 1931-05-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 1.72 | Wilcy Moore | 39.7 | BOS |
| +024+ | 1.62 | Lefty Grove | 43.3 | OAK |
| +025+ | 1.55 | Jakie May | 18.3 | CHN |
| XXXXX | 1.19 | Jack Berly | 20 | SFN |
| XXXXX | 1.05 | Pat Malone | 35 | CHN |
| XXXXX | 0.85 | Ray Benge | 48.3 | PHI |
| XXXXX | 0.8 | Clyde Day | 14.7 | LAN |
| XXXXX | 0.79 | Clint Brown | 49.7 | CLE |
| XXXXX | 0.65 | Lefty Stewart | 47 | BAL |
| XXXXX | 0.5 | Art Herring | 14 | DET |
| XXXXX | 0.48 | Earl Mattingly | 11.3 | LAN |
| XXXXX | 0.48 | Paul Derringer | 9.7 | SLN |
| XXXXX | 0.41 | Lefty Weinert | 11.7 | NYA |
| XXXXX | 0.38 | Watty Clark | 40.3 | LAN |
| XXXXX | 0.32 | Bill Sherdel | 31.7 | ATL |
| XXXXX | 0.28 | Allyn Stout | 3 | SLN |
| XXXXX | 0.27 | Bill McAfee | 5 | ATL |
| XXXXX | 0.26 | Jack Ogden | 2.7 | CIN |
| XXXXX | 0.25 | Fred Stiely | 2.7 | BAL |
| XXXXX | 0.24 | Frank Watt | 21 | PHI |
| XXXXX | 0.16 | Larry Benton | 34 | CIN |
| XXXXX | 0.11 | Jack Quinn | 14 | LAN |
| XXXXX | 0 | Bobby Burke | 23.7 | MIN |
| XXXXX | -0.05 | Pete Donohue | 11 | SFN |
| XXXXX | -0.07 | Ed Durham | 32 | BOS |
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