| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Pelfrey | MIN | -3.87 | 201305310_SEA_MIN |
| Roberto Hernandez | TBA | -3.13 | 201305290_TBA_MIA |
| Dillon Gee | NYN | -2.79 | 201305300_NYN_NYA |
| Joe Saunders | SEA | -1.43 | 201305290_SEA_SDN |
| Dallas Keuchel | HOU | -1.4 | 201305310_HOU_ANA |
Based on accumulated WAA for this season up to 2013-05-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.45 | Clayton Kershaw | 87.3 | LAN |
| +005+ | 3.83 | Matt Harvey | 78 | NYN |
| +006+ | 3.48 | Patrick Corbin | 68.3 | ARI |
| +007+ | 3.47 | Hisashi Iwakuma | 80.3 | SEA |
| +008+ | 3.22 | Cliff Lee | 80.7 | PHI |
| +011+ | 3.12 | Felix Hernandez | 83.3 | SEA |
| +012+ | 3.07 | Jordan Zimmermann | 79.7 | WAS |
| +016+ | 2.82 | Shelby Miller | 62.3 | SLN |
| +019+ | 2.77 | Adam Wainwright | 80 | SLN |
| +020+ | 2.63 | Matt Moore | 62 | TBA |
| +021+ | 2.58 | Mike Minor | 72.7 | ATL |
| +022+ | 2.57 | Stephen Strasburg | 74.3 | WAS |
| +024+ | 2.55 | Jeff Locke | 64 | PIT |
| +025+ | 2.49 | Hiroki Kuroda | 67.7 | NYA |
| +029+ | 2.19 | A.J. Burnett | 76 | PIT |
| +033+ | 2.12 | Travis Wood | 72 | CHN |
| +042+ | 2.02 | Derek Holland | 73.7 | TEX |
| +043+ | 1.98 | James Shields | 79 | KCA |
| +044+ | 1.98 | Jeff Samardzija | 72.7 | CHN |
| +047+ | 1.93 | Hyun-Jin Ryu | 71.7 | LAN |
| +052+ | 1.87 | Jeanmar Gomez | 43 | PIT |
| +058+ | 1.79 | Anibal Sanchez | 71 | DET |
| +059+ | 1.79 | Justin Masterson | 82 | CLE |
| +065+ | 1.71 | Trevor Cahill | 72 | ARI |
| +066+ | 1.69 | Scott Feldman | 60.7 | CHN |
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