| Starter | Tm | Tier | Game |
|---|---|---|---|
| Matt Harvey | BAL | -3 | 202104200_BAL_MIA |
| Nick Margevicius | SEA | -1.99 | 202104180_HOU_SEA |
| Antonio Senzatela | COL | -1.93 | 202104180_NYN_COL |
| Madison Bumgarner | ARI | -1.87 | 202104180_ARI_WAS |
| Martin Perez | BOS | -1.22 | 202104182_CHA_BOS |
Based on accumulated WAA for this season up to 2021-04-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 2.01 | Corbin Burnes | 24.3 | MIL |
| +004+ | 1.82 | Tyler Glasnow | 24.7 | TBA |
| +005+ | 1.73 | Joe Musgrove | 26 | SDN |
| +006+ | 1.66 | Jacob deGrom | 20 | NYN |
| +007+ | 1.62 | Carlos Rodon | 19 | CHA |
| +009+ | 1.5 | Danny Duffy | 18 | KCA |
| +010+ | 1.48 | Marcus Stroman | 20.3 | NYN |
| +011+ | 1.48 | Lance Lynn | 19.7 | CHA |
| +013+ | 1.41 | John Means | 23.7 | BAL |
| +015+ | 1.28 | Matt Boyd | 26.7 | DET |
| XXXXX | 1.24 | Michael Pineda | 18 | MIN |
| XXXXX | 1.22 | Gerrit Cole | 24.7 | NYA |
| XXXXX | 1.18 | Dane Dunning | 15 | TEX |
| XXXXX | 1.15 | Anthony DeSclafani | 17 | SFN |
| XXXXX | 1.14 | Steven Matz | 18.3 | TOR |
| XXXXX | 1.11 | Aaron Nola | 24.7 | PHI |
| XXXXX | 1.08 | Shane Bieber | 29.3 | CLE |
| XXXXX | 1.05 | Brandon Woodruff | 23 | MIL |
| XXXXX | 1.01 | Johnny Cueto | 20 | SFN |
| XXXXX | 1 | Clayton Kershaw | 24.7 | LAN |
| XXXXX | 0.91 | Kevin Gausman | 25.7 | SFN |
| XXXXX | 0.91 | Trevor Bauer | 26 | LAN |
| XXXXX | 0.89 | Aaron Civale | 20.7 | CLE |
| XXXXX | 0.87 | Jon Gray | 22.3 | COL |
| XXXXX | 0.86 | Taylor Widener | 17 | ARI |
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