| Starter | Tm | Tier | Game |
|---|---|---|---|
| Patrick Corbin | WAS | -5.7 | 202108310_PHI_WAS |
| Matt Harvey | BAL | -5.29 | 202109010_BAL_TOR |
| Jordan Lyles | TEX | -4.61 | 202108310_COL_TEX |
| J.A. Happ | SLN | -4 | 202109012_SLN_CIN |
| Mitch Keller | PIT | -3.09 | 202109020_PIT_CHN |
Based on accumulated WAA for this season up to 2021-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.71 | Walker Buehler | 176 | LAN |
| +004+ | 6.67 | Brandon Woodruff | 157.3 | MIL |
| +006+ | 6.35 | Max Scherzer | 146 | TOT |
| +007+ | 6.15 | Corbin Burnes | 139 | MIL |
| +009+ | 5.9 | Kevin Gausman | 157 | SFN |
| +010+ | 5.76 | Robbie Ray | 159.3 | TOR |
| +012+ | 5.43 | Gerrit Cole | 155 | NYA |
| +014+ | 5.32 | Marcus Stroman | 151.7 | NYN |
| +015+ | 5.27 | Lance Lynn | 135.7 | CHA |
| +017+ | 5.16 | Carlos Rodon | 119.7 | CHA |
| +018+ | 5.15 | Zack Wheeler | 182.7 | PHI |
| +023+ | 4.98 | Adam Wainwright | 169.7 | SLN |
| +025+ | 4.85 | Freddy Peralta | 121.3 | MIL |
| +030+ | 4.44 | Joe Musgrove | 148.3 | SDN |
| +031+ | 4.4 | Kyle Gibson | 150 | TOT |
| +035+ | 4.28 | Ranger Suarez | 67 | PHI |
| +038+ | 4.14 | Wade Miley | 148.7 | CIN |
| +042+ | 4.11 | Logan Webb | 112.3 | SFN |
| +056+ | 3.51 | Sandy Alcantara | 171.7 | MIA |
| +057+ | 3.5 | Cal Quantrill | 116.7 | CLE |
| +064+ | 3.34 | Julio Urias | 150.7 | LAN |
| +065+ | 3.33 | Chris Bassitt | 151 | OAK |
| +077+ | 3.02 | Framber Valdez | 105 | HOU |
| +079+ | 2.99 | Shohei Ohtani | 105 | ANA |
| +083+ | 2.94 | Lance McCullers | 132.3 | HOU |
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