| Starter | Tm | Tier | Game |
|---|---|---|---|
| Patrick Corbin | WAS | -5.66 | 202109280_WAS_COL |
| Jackson Kowar | KCA | -2.35 | 202109270_KCA_CLE |
| Michael Wacha | TBA | -2.25 | 202109280_TBA_HOU |
| Mitch Keller | PIT | -2.18 | 202109280_CHN_PIT |
| Dallas Keuchel | CHA | -1.84 | 202109270_CHA_DET |
Based on accumulated WAA for this season up to 2021-09-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.08 | Walker Buehler | 202.7 | LAN |
| +002+ | 7.54 | Max Scherzer | 179.3 | TOT |
| +004+ | 7.3 | Corbin Burnes | 165 | MIL |
| +005+ | 7.26 | Zack Wheeler | 213.3 | PHI |
| +006+ | 7.07 | Robbie Ray | 188 | TOR |
| +010+ | 6.81 | Brandon Woodruff | 179.3 | MIL |
| +012+ | 6.44 | Ranger Suarez | 99 | PHI |
| +016+ | 5.96 | Carlos Rodon | 132.7 | CHA |
| +018+ | 5.77 | Adam Wainwright | 206.3 | SLN |
| +021+ | 5.65 | Marcus Stroman | 179 | NYN |
| +023+ | 5.59 | Lance Lynn | 152 | CHA |
| +025+ | 5.51 | Kevin Gausman | 185 | SFN |
| +026+ | 5.46 | Sandy Alcantara | 200.7 | MIA |
| +032+ | 5.03 | Trevor Rogers | 133 | MIA |
| +035+ | 4.87 | Cal Quantrill | 149.7 | CLE |
| +039+ | 4.77 | Julio Urias | 179.3 | LAN |
| +043+ | 4.67 | Max Fried | 165.7 | ATL |
| +046+ | 4.65 | Freddy Peralta | 144.3 | MIL |
| +052+ | 4.3 | Gerrit Cole | 181.3 | NYA |
| +060+ | 4.1 | Joe Musgrove | 176.3 | SDN |
| +062+ | 4.01 | Logan Webb | 141.3 | SFN |
| +066+ | 3.88 | Chris Bassitt | 157.3 | OAK |
| +074+ | 3.67 | Lance McCullers | 156.3 | HOU |
| +077+ | 3.66 | Charlie Morton | 183 | ATL |
| +078+ | 3.64 | Frankie Montas | 187 | OAK |
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