| Starter | Tm | Tier | Game |
|---|---|---|---|
| Keegan Akin | BAL | -4.2 | 202109170_BAL_BOS |
| Wil Crowe | PIT | -2.66 | 202109170_PIT_MIA |
| Zach Davies | CHN | -2.54 | 202109170_CHN_MIL |
| Griffin Jax | MIN | -2.39 | 202109150_CLE_MIN |
| Dallas Keuchel | CHA | -2.2 | 202109150_ANA_CHA |
Based on accumulated WAA for this season up to 2021-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.14 | Walker Buehler | 192 | LAN |
| +002+ | 8.01 | Max Scherzer | 162 | TOT |
| +006+ | 6.9 | Corbin Burnes | 152 | MIL |
| +007+ | 6.87 | Robbie Ray | 177.3 | TOR |
| +008+ | 6.65 | Zack Wheeler | 200.3 | PHI |
| +009+ | 6.5 | Brandon Woodruff | 169.3 | MIL |
| +012+ | 6.09 | Adam Wainwright | 190.3 | SLN |
| +013+ | 5.9 | Marcus Stroman | 169 | NYN |
| +014+ | 5.89 | Lance Lynn | 140.7 | CHA |
| +016+ | 5.75 | Gerrit Cole | 163.7 | NYA |
| +017+ | 5.63 | Kevin Gausman | 175 | SFN |
| +019+ | 5.55 | Carlos Rodon | 124.7 | CHA |
| +020+ | 5.4 | Ranger Suarez | 84 | PHI |
| +027+ | 5.12 | Sandy Alcantara | 188.7 | MIA |
| +028+ | 5.04 | Freddy Peralta | 133 | MIL |
| +034+ | 4.65 | Joe Musgrove | 165.7 | SDN |
| +038+ | 4.58 | Julio Urias | 168.3 | LAN |
| +043+ | 4.43 | Trevor Rogers | 122.7 | MIA |
| +044+ | 4.41 | Cal Quantrill | 137 | CLE |
| +050+ | 4.16 | Wade Miley | 160 | CIN |
| +056+ | 4.01 | Logan Webb | 132.3 | SFN |
| +063+ | 3.68 | Collin McHugh | 57.7 | TBA |
| +066+ | 3.6 | Lance McCullers | 144.3 | HOU |
| +070+ | 3.49 | Chris Bassitt | 151 | OAK |
| +074+ | 3.4 | Jose Berrios | 173.3 | TOT |
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