| Starter | Tm | Tier | Game |
|---|---|---|---|
| Edinson Volquez | SDN | -5.64 | 201306120_ATL_SDN |
| Mike Pelfrey | MIN | -3.7 | 201306120_PHI_MIN |
| Ubaldo Jimenez | CLE | -2.83 | 201306120_CLE_TEX |
| Wily Peralta | MIL | -2.34 | 201306110_MIL_MIA |
| Roberto Hernandez | TBA | -2.14 | 201306110_BOS_TBA |
Based on accumulated WAA for this season up to 2013-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.94 | Clayton Kershaw | 100.3 | LAN |
| +003+ | 4.76 | Hisashi Iwakuma | 95.3 | SEA |
| +006+ | 4.49 | Clay Buchholz | 84.3 | BOS |
| +007+ | 4.44 | Jordan Zimmermann | 94.7 | WAS |
| +011+ | 3.74 | Matt Harvey | 90 | NYN |
| +013+ | 3.55 | Adam Wainwright | 96 | SLN |
| +015+ | 3.34 | Cliff Lee | 95.3 | PHI |
| +016+ | 3.3 | Felix Hernandez | 97.7 | SEA |
| +017+ | 3.25 | Shelby Miller | 81.3 | SLN |
| +018+ | 3.2 | Patrick Corbin | 86.7 | ARI |
| +021+ | 3.06 | Mike Minor | 84.7 | ATL |
| +023+ | 2.84 | James Shields | 100 | KCA |
| +025+ | 2.76 | Jeff Locke | 75.3 | PIT |
| +026+ | 2.68 | Travis Wood | 85 | CHN |
| +032+ | 2.43 | Yu Darvish | 88.3 | TEX |
| +034+ | 2.4 | Mike Leake | 81.7 | CIN |
| +042+ | 2.28 | Hyun-Jin Ryu | 85.3 | LAN |
| +041+ | 2.28 | Chris Sale | 77.3 | CHA |
| +047+ | 2.16 | Hiroki Kuroda | 79.3 | NYA |
| +051+ | 2.05 | Kris Medlen | 78.3 | ATL |
| +052+ | 2.04 | Mat Latos | 84.7 | CIN |
| +056+ | 2.01 | Ervin Santana | 84.3 | KCA |
| +057+ | 2 | Bartolo Colon | 83.3 | OAK |
| +062+ | 1.89 | Alex Cobb | 79.3 | TBA |
| +070+ | 1.75 | Lance Lynn | 81 | SLN |
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