| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jeff Francis | COL | -5.9 | 201304270_COL_ARI |
| Rick Porcello | DET | -4.99 | 201304270_ATL_DET |
| Jonathan Sanchez | PIT | -3.62 | 201304260_PIT_SLN |
| Joe Blanton | ANA | -3.46 | 201304270_ANA_SEA |
| J.A. Happ | TOR | -2.03 | 201304270_TOR_NYA |
Based on accumulated WAA for this season up to 2013-04-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.35 | Clay Buchholz | 37.7 | BOS |
| +002+ | 2.11 | Matt Moore | 32 | TBA |
| +004+ | 1.95 | Felix Hernandez | 42.7 | SEA |
| +007+ | 1.91 | Matt Harvey | 35 | NYN |
| +008+ | 1.86 | Anibal Sanchez | 33.7 | DET |
| +010+ | 1.84 | Jake Westbrook | 27.7 | SLN |
| +014+ | 1.71 | Yu Darvish | 32.7 | TEX |
| +015+ | 1.65 | Adam Wainwright | 37.3 | SLN |
| +016+ | 1.64 | Justin Masterson | 34 | CLE |
| +019+ | 1.6 | Carlos Villanueva | 29.3 | CHN |
| +018+ | 1.6 | Ervin Santana | 36 | KCA |
| +020+ | 1.57 | Jordan Zimmermann | 36 | WAS |
| +022+ | 1.52 | Madison Bumgarner | 33.7 | SFN |
| +023+ | 1.51 | Ross Detwiler | 26 | WAS |
| +024+ | 1.47 | Alex Cobb | 29.7 | TBA |
| +029+ | 1.4 | Clayton Kershaw | 33.7 | LAN |
| +030+ | 1.39 | Shelby Miller | 25 | SLN |
| +032+ | 1.38 | Hisashi Iwakuma | 31.7 | SEA |
| +034+ | 1.33 | Justin Verlander | 32.3 | DET |
| XXXXX | 1.21 | Kyle Kendrick | 33.7 | PHI |
| XXXXX | 1.21 | Mat Latos | 33.3 | CIN |
| XXXXX | 1.21 | Travis Wood | 32 | CHN |
| XXXXX | 1.2 | Mike Minor | 25 | ATL |
| XXXXX | 1.19 | Patrick Corbin | 26.3 | ARI |
| XXXXX | 1.18 | Jon Lester | 31.7 | BOS |
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