| Starter | Tm | Tier | Game |
|---|---|---|---|
| Clayton Kershaw | LAN | 9.77 | 201305030_LAN_SFN |
| Felix Hernandez | SEA | 4.98 | 201305030_SEA_TOR |
| Cliff Lee | PHI | 4.94 | 201305010_PHI_CLE |
| Jordan Zimmermann | WAS | 4.09 | 201305010_WAS_ATL |
| Doug Fister | DET | 3.56 | 201305030_DET_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jeff Francis | COL | -5.6 | 201305030_TBA_COL |
| Rick Porcello | DET | -4.92 | 201305020_DET_HOU |
| Joe Blanton | ANA | -3.52 | 201305020_BAL_ANA |
| Jordan Lyles | HOU | -2.11 | 201305020_DET_HOU |
| J.A. Happ | TOR | -1.95 | 201305020_BOS_TOR |
Based on accumulated WAA for this season up to 2013-05-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.08 | Clay Buchholz | 44.7 | BOS |
| +003+ | 2.75 | Felix Hernandez | 50.7 | SEA |
| +004+ | 2.64 | Clayton Kershaw | 48.7 | LAN |
| +006+ | 2.4 | Jordan Zimmermann | 44 | WAS |
| +007+ | 2.23 | Madison Bumgarner | 40.7 | SFN |
| +009+ | 2.22 | Jake Westbrook | 33.7 | SLN |
| +012+ | 2.15 | Matt Harvey | 40.3 | NYN |
| +013+ | 1.98 | Hisashi Iwakuma | 37.7 | SEA |
| +014+ | 1.93 | Adam Wainwright | 44.3 | SLN |
| +017+ | 1.84 | Mat Latos | 39.3 | CIN |
| +018+ | 1.79 | Matt Moore | 37 | TBA |
| +019+ | 1.77 | Anibal Sanchez | 39.7 | DET |
| +020+ | 1.74 | Justin Verlander | 39.3 | DET |
| +022+ | 1.65 | Shelby Miller | 36.7 | SLN |
| +027+ | 1.53 | Kevin Slowey | 37.7 | MIA |
| +030+ | 1.52 | Kyle Kendrick | 40.7 | PHI |
| +032+ | 1.49 | Kevin Correia | 36.3 | MIN |
| +033+ | 1.48 | Yu Darvish | 38.7 | TEX |
| +036+ | 1.43 | A.J. Burnett | 42 | PIT |
| +037+ | 1.42 | Patrick Corbin | 33 | ARI |
| +040+ | 1.39 | Hiroki Kuroda | 36 | NYA |
| +043+ | 1.34 | Travis Wood | 39.7 | CHN |
| XXXXX | 1.24 | Ross Detwiler | 36 | WAS |
| XXXXX | 1.23 | Derek Holland | 42.7 | TEX |
| XXXXX | 1.21 | Alex Cobb | 35.3 | TBA |
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