| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ubaldo Jimenez | CLE | -4.7 | 201305270_CLE_CIN |
| Mike Pelfrey | MIN | -2.78 | 201305260_MIN_DET |
| Phil Hughes | NYA | -2.4 | 201305270_NYA_NYN |
| Dillon Gee | NYN | -1.96 | 201305250_ATL_NYN |
| Felix Doubront | BOS | -1.82 | 201305260_CLE_BOS |
Based on accumulated WAA for this season up to 2013-05-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.45 | Clayton Kershaw | 80.3 | LAN |
| +003+ | 3.98 | Jordan Zimmermann | 73.7 | WAS |
| +006+ | 3.47 | Patrick Corbin | 68.3 | ARI |
| +007+ | 3.31 | Matt Harvey | 70 | NYN |
| +012+ | 2.84 | Shelby Miller | 62.3 | SLN |
| +013+ | 2.8 | Adam Wainwright | 80 | SLN |
| +015+ | 2.79 | Hisashi Iwakuma | 72.7 | SEA |
| +017+ | 2.71 | Cliff Lee | 72.7 | PHI |
| +020+ | 2.61 | Felix Hernandez | 75.3 | SEA |
| +021+ | 2.6 | Stephen Strasburg | 72.3 | WAS |
| +022+ | 2.56 | Matt Moore | 61 | TBA |
| +024+ | 2.38 | Mike Minor | 65.7 | ATL |
| +025+ | 2.35 | A.J. Burnett | 70 | PIT |
| +027+ | 2.27 | Anibal Sanchez | 64.3 | DET |
| +031+ | 2.13 | Alex Cobb | 67.7 | TBA |
| +032+ | 2.13 | Jeff Locke | 58.7 | PIT |
| +035+ | 2.01 | Travis Wood | 66 | CHN |
| +036+ | 2.01 | Jeff Samardzija | 72.7 | CHN |
| +040+ | 1.98 | James Shields | 79 | KCA |
| +049+ | 1.85 | Hiroki Kuroda | 60.7 | NYA |
| +054+ | 1.7 | Trevor Cahill | 72 | ARI |
| +056+ | 1.69 | Yu Darvish | 74.3 | TEX |
| +059+ | 1.61 | Jerome Williams | 52.3 | ANA |
| +060+ | 1.6 | Derek Holland | 66.7 | TEX |
| +064+ | 1.57 | Scott Feldman | 54.7 | CHN |
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