| Starter | Tm | Tier | Game |
|---|---|---|---|
| Felix Hernandez | SEA | 7.34 | 201305190_SEA_CLE |
| Jordan Zimmermann | WAS | 5.89 | 201305180_WAS_SDN |
| Cliff Lee | PHI | 4.97 | 201305170_CIN_PHI |
| James Shields | KCA | 4.53 | 201305170_KCA_OAK |
| Hiroki Kuroda | NYA | 4.04 | 201305170_TOR_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe Blanton | ANA | -4.33 | 201305180_CHA_ANA |
| Rick Porcello | DET | -4.24 | 201305170_DET_TEX |
| Ubaldo Jimenez | CLE | -3.83 | 201305170_SEA_CLE |
| Jordan Lyles | HOU | -3.62 | 201305170_HOU_PIT |
| Ricky Nolasco | MIA | -1.87 | 201305190_ARI_MIA |
Based on accumulated WAA for this season up to 2013-05-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.96 | Clayton Kershaw | 64.3 | LAN |
| +003+ | 3.74 | Jordan Zimmermann | 66.7 | WAS |
| +004+ | 3.56 | Matt Harvey | 63.7 | NYN |
| +005+ | 3.36 | Clay Buchholz | 65.7 | BOS |
| +006+ | 3.15 | Felix Hernandez | 69.7 | SEA |
| +007+ | 3.04 | Shelby Miller | 51.3 | SLN |
| +008+ | 2.96 | Hisashi Iwakuma | 58.7 | SEA |
| +010+ | 2.9 | Patrick Corbin | 53.3 | ARI |
| +012+ | 2.69 | Hiroki Kuroda | 58.7 | NYA |
| +015+ | 2.46 | Travis Wood | 60.3 | CHN |
| +016+ | 2.4 | James Shields | 66 | KCA |
| +019+ | 2.22 | Matt Moore | 55 | TBA |
| +021+ | 2.19 | Chris Sale | 64 | CHA |
| +022+ | 2.16 | Adam Wainwright | 64.7 | SLN |
| +025+ | 2.07 | A.J. Burnett | 63 | PIT |
| +026+ | 2.07 | Scott Feldman | 49.3 | CHN |
| +034+ | 1.89 | Justin Masterson | 70 | CLE |
| +035+ | 1.85 | Trevor Cahill | 58 | ARI |
| +036+ | 1.79 | Cliff Lee | 63.7 | PHI |
| +038+ | 1.75 | Jon Lester | 59.7 | BOS |
| +039+ | 1.72 | Kyle Kendrick | 60.7 | PHI |
| +042+ | 1.68 | Mike Minor | 58.3 | ATL |
| +046+ | 1.61 | Ervin Santana | 55.3 | KCA |
| +047+ | 1.6 | Stephen Strasburg | 57.3 | WAS |
| +048+ | 1.59 | Zach McAllister | 51 | CLE |
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