| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jeff Francis | COL | -6.3 | 201305140_COL_CHN |
| Rick Porcello | DET | -4.99 | 201305120_CLE_DET |
| Joe Blanton | ANA | -3.18 | 201305130_KCA_ANA |
| Jordan Lyles | HOU | -2.16 | 201305120_TEX_HOU |
| Roberto Hernandez | TBA | -1.91 | 201305120_SDN_TBA |
Based on accumulated WAA for this season up to 2013-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.88 | Clayton Kershaw | 64.3 | LAN |
| +002+ | 3.68 | Felix Hernandez | 64.7 | SEA |
| +004+ | 3.24 | Matt Harvey | 56.3 | NYN |
| +005+ | 3.14 | Jordan Zimmermann | 58.7 | WAS |
| +006+ | 3.12 | Clay Buchholz | 58.7 | BOS |
| +007+ | 2.85 | Patrick Corbin | 53.3 | ARI |
| +009+ | 2.68 | Hisashi Iwakuma | 51.7 | SEA |
| +010+ | 2.5 | Shelby Miller | 45.7 | SLN |
| +012+ | 2.41 | Travis Wood | 53.3 | CHN |
| +014+ | 2.23 | Justin Verlander | 51.3 | DET |
| +015+ | 2.22 | Adam Wainwright | 58.7 | SLN |
| +016+ | 2.15 | Madison Bumgarner | 53.7 | SFN |
| +017+ | 2.14 | Anibal Sanchez | 52.7 | DET |
| +023+ | 1.99 | James Shields | 58 | KCA |
| +026+ | 1.97 | Kyle Kendrick | 54.7 | PHI |
| +027+ | 1.93 | Hiroki Kuroda | 50.7 | NYA |
| +033+ | 1.75 | Matt Moore | 48 | TBA |
| +038+ | 1.63 | A.J. Burnett | 56 | PIT |
| +039+ | 1.62 | Kevin Slowey | 49.3 | MIA |
| +042+ | 1.54 | Yu Darvish | 52.7 | TEX |
| +043+ | 1.53 | Cliff Lee | 56.7 | PHI |
| +044+ | 1.51 | Jon Lester | 52.7 | BOS |
| +046+ | 1.5 | Mike Minor | 52.3 | ATL |
| +048+ | 1.45 | Ross Detwiler | 42.7 | WAS |
| +049+ | 1.45 | Jeremy Guthrie | 54.3 | KCA |
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