| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jake Arrieta | SDN | -6.25 | 202109140_SDN_SFN |
| Jesus Luzardo | MIA | -3.57 | 202109140_MIA_WAS |
| Jordan Lyles | TEX | -3.38 | 202109140_HOU_TEX |
| Mitch Keller | PIT | -2.5 | 202109150_CIN_PIT |
| Griffin Jax | MIN | -2.39 | 202109150_CLE_MIN |
Based on accumulated WAA for this season up to 2021-09-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.17 | Walker Buehler | 186 | LAN |
| +002+ | 8.01 | Max Scherzer | 162 | TOT |
| +006+ | 6.9 | Corbin Burnes | 152 | MIL |
| +007+ | 6.88 | Robbie Ray | 177.3 | TOR |
| +008+ | 6.5 | Brandon Woodruff | 169.3 | MIL |
| +010+ | 6.37 | Zack Wheeler | 195.3 | PHI |
| +012+ | 6.09 | Adam Wainwright | 190.3 | SLN |
| +013+ | 6.01 | Kevin Gausman | 170 | SFN |
| +016+ | 5.9 | Lance Lynn | 140.7 | CHA |
| +015+ | 5.9 | Marcus Stroman | 169 | NYN |
| +017+ | 5.76 | Gerrit Cole | 163.7 | NYA |
| +019+ | 5.55 | Carlos Rodon | 124.7 | CHA |
| +022+ | 5.4 | Ranger Suarez | 84 | PHI |
| +026+ | 5.12 | Sandy Alcantara | 188.7 | MIA |
| +027+ | 5.04 | Freddy Peralta | 133 | MIL |
| +036+ | 4.63 | Joe Musgrove | 165.7 | SDN |
| +038+ | 4.57 | Julio Urias | 168.3 | LAN |
| +040+ | 4.43 | Trevor Rogers | 122.7 | MIA |
| +041+ | 4.4 | Cal Quantrill | 137 | CLE |
| +046+ | 4.16 | Wade Miley | 160 | CIN |
| +062+ | 3.77 | Logan Webb | 125.3 | SFN |
| +064+ | 3.69 | Collin McHugh | 57.7 | TBA |
| +067+ | 3.61 | Lance McCullers | 144.3 | HOU |
| +069+ | 3.49 | Chris Bassitt | 151 | OAK |
| +072+ | 3.4 | Jose Berrios | 173.3 | TOT |
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