| Starter | Tm | Tier | Game |
|---|---|---|---|
| Patrick Corbin | WAS | -5.66 | 202109280_WAS_COL |
| J.A. Happ | SLN | -5.05 | 202109300_MIL_SLN |
| Vince Velasquez | SDN | -2.88 | 202109300_SDN_LAN |
| Michael Wacha | TBA | -2.25 | 202109280_TBA_HOU |
| Mitch Keller | PIT | -2.18 | 202109280_CHN_PIT |
Based on accumulated WAA for this season up to 2021-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.1 | Walker Buehler | 202.7 | LAN |
| +003+ | 7.55 | Max Scherzer | 179.3 | TOT |
| +004+ | 7.32 | Corbin Burnes | 165 | MIL |
| +005+ | 7.28 | Zack Wheeler | 213.3 | PHI |
| +008+ | 6.83 | Brandon Woodruff | 179.3 | MIL |
| +011+ | 6.57 | Robbie Ray | 193.3 | TOR |
| +012+ | 6.45 | Ranger Suarez | 99 | PHI |
| +016+ | 5.96 | Carlos Rodon | 132.7 | CHA |
| +018+ | 5.78 | Adam Wainwright | 206.3 | SLN |
| +020+ | 5.66 | Marcus Stroman | 179 | NYN |
| +021+ | 5.6 | Lance Lynn | 152 | CHA |
| +023+ | 5.52 | Kevin Gausman | 185 | SFN |
| +025+ | 5.48 | Sandy Alcantara | 200.7 | MIA |
| +031+ | 5.05 | Trevor Rogers | 133 | MIA |
| +036+ | 4.88 | Cal Quantrill | 149.7 | CLE |
| +039+ | 4.78 | Julio Urias | 179.3 | LAN |
| +044+ | 4.67 | Max Fried | 165.7 | ATL |
| +045+ | 4.67 | Freddy Peralta | 144.3 | MIL |
| +053+ | 4.31 | Gerrit Cole | 181.3 | NYA |
| +060+ | 4.12 | Joe Musgrove | 176.3 | SDN |
| +063+ | 4.02 | Logan Webb | 141.3 | SFN |
| +067+ | 3.89 | Chris Bassitt | 157.3 | OAK |
| +070+ | 3.84 | Lance McCullers | 162.3 | HOU |
| +073+ | 3.78 | Collin McHugh | 63 | TBA |
| +076+ | 3.66 | Charlie Morton | 183 | ATL |
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