| Starter | Tm | Tier | Game |
|---|---|---|---|
| Matt Harvey | CIN | -3.09 | 201805160_CIN_SFN |
| Josh Tomlin | CLE | -2.91 | 201805150_CLE_DET |
| Jason Hammel | KCA | -2.49 | 201805160_TBA_KCA |
| Hector Santiago | CHA | -1.74 | 201805160_CHA_PIT |
| Wei-Yin Chen | MIA | -1.51 | 201805150_LAN_MIA |
Based on accumulated WAA for this season up to 2018-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.98 | Justin Verlander | 68.7 | HOU |
| +003+ | 3.46 | Gerrit Cole | 61.7 | HOU |
| +004+ | 3.33 | Max Scherzer | 58.7 | WAS |
| +006+ | 2.92 | Aaron Nola | 58.7 | PHI |
| +010+ | 2.67 | Luis Severino | 59 | NYA |
| +011+ | 2.64 | Corey Kluber | 65.3 | CLE |
| +013+ | 2.6 | Chris Sale | 63 | BOS |
| +014+ | 2.55 | Sean Manaea | 61.3 | OAK |
| +016+ | 2.41 | Charlie Morton | 48.7 | HOU |
| +018+ | 2.32 | Jacob deGrom | 44.3 | NYN |
| +020+ | 2.24 | Patrick Corbin | 57 | ARI |
| +025+ | 2.04 | Gio Gonzalez | 49.7 | WAS |
| +026+ | 2.03 | Trevor Bauer | 59 | CLE |
| +035+ | 1.78 | Trevor Williams | 53 | PIT |
| +039+ | 1.71 | Mike Clevinger | 53.3 | CLE |
| +040+ | 1.7 | Sean Newcomb | 46.7 | ATL |
| +045+ | 1.64 | Miles Mikolas | 51.3 | SLN |
| +049+ | 1.59 | Bartolo Colon | 51 | TEX |
| +052+ | 1.56 | CC Sabathia | 36.3 | NYA |
| +059+ | 1.49 | Jake Arrieta | 41.7 | PHI |
| +061+ | 1.46 | Jeremy Hellickson | 32.7 | WAS |
| +063+ | 1.43 | Jon Lester | 44 | CHN |
| +064+ | 1.42 | Dallas Keuchel | 58 | HOU |
| +071+ | 1.38 | Fernando Romero | 16.7 | MIN |
| +080+ | 1.31 | Mike Foltynewicz | 47 | ATL |
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