| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ubaldo Jimenez | CLE | -4.24 | 201306010_TBA_CLE |
| Mike Pelfrey | MIN | -3.87 | 201305310_SEA_MIN |
| Dillon Gee | NYN | -2.79 | 201305300_NYN_NYA |
| Wily Peralta | MIL | -1.9 | 201306010_MIL_PHI |
| Phil Hughes | NYA | -1.85 | 201306010_BOS_NYA |
Based on accumulated WAA for this season up to 2013-06-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.43 | Clayton Kershaw | 87.3 | LAN |
| +005+ | 3.84 | Matt Harvey | 78 | NYN |
| +007+ | 3.47 | Hisashi Iwakuma | 80.3 | SEA |
| +008+ | 3.46 | Shelby Miller | 69.3 | SLN |
| +010+ | 3.39 | Adam Wainwright | 89 | SLN |
| +013+ | 3.21 | Cliff Lee | 80.7 | PHI |
| +015+ | 3.12 | Felix Hernandez | 83.3 | SEA |
| +016+ | 3.06 | Jordan Zimmermann | 79.7 | WAS |
| +020+ | 2.63 | Matt Moore | 62 | TBA |
| +021+ | 2.56 | Stephen Strasburg | 74.3 | WAS |
| +022+ | 2.55 | Mike Minor | 72.7 | ATL |
| +023+ | 2.55 | Jeff Locke | 64 | PIT |
| +025+ | 2.48 | Hiroki Kuroda | 67.7 | NYA |
| +029+ | 2.4 | James Shields | 86 | KCA |
| +032+ | 2.18 | A.J. Burnett | 76 | PIT |
| +036+ | 2.11 | Travis Wood | 72 | CHN |
| +039+ | 2.08 | Mike Leake | 68.7 | CIN |
| +044+ | 2 | Derek Holland | 73.7 | TEX |
| +048+ | 1.93 | Jeff Samardzija | 79 | CHN |
| +050+ | 1.91 | Hyun-Jin Ryu | 71.7 | LAN |
| +052+ | 1.87 | Jeanmar Gomez | 43 | PIT |
| +054+ | 1.82 | Jerome Williams | 59.3 | ANA |
| +057+ | 1.79 | Anibal Sanchez | 71 | DET |
| +058+ | 1.78 | Justin Masterson | 82 | CLE |
| +061+ | 1.71 | Trevor Cahill | 72 | ARI |
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