| Starter | Tm | Tier | Game |
|---|---|---|---|
| Edinson Volquez | SDN | -5.09 | 201308120_SDN_COL |
| Aaron Harang | SEA | -3.88 | 201308140_SEA_TBA |
| Wade Davis | KCA | -3.14 | 201308120_MIA_KCA |
| Jordan Lyles | HOU | -2.87 | 201308130_HOU_OAK |
| Esmil Rogers | TOR | -2.26 | 201308140_BOS_TOR |
Based on accumulated WAA for this season up to 2013-08-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.51 | Clayton Kershaw | 182.3 | LAN |
| +005+ | 6.03 | Matt Harvey | 165.7 | NYN |
| +008+ | 5.7 | Felix Hernandez | 173.7 | SEA |
| +009+ | 5.67 | Hiroki Kuroda | 154.7 | NYA |
| +011+ | 5.05 | Adam Wainwright | 182.7 | SLN |
| +012+ | 4.99 | Patrick Corbin | 163.3 | ARI |
| +019+ | 4.55 | Jose Fernandez | 139.7 | MIA |
| +020+ | 4.49 | Jeff Locke | 137 | PIT |
| +021+ | 4.43 | Yu Darvish | 153.7 | TEX |
| +024+ | 4.27 | Madison Bumgarner | 158 | SFN |
| +025+ | 4.2 | Chris Sale | 158.3 | CHA |
| +031+ | 3.86 | Bruce Chen | 72.3 | KCA |
| +032+ | 3.78 | Mike Minor | 157 | ATL |
| +034+ | 3.75 | Max Scherzer | 164.3 | DET |
| +035+ | 3.73 | Stephen Strasburg | 146.3 | WAS |
| +036+ | 3.66 | Anibal Sanchez | 125.7 | DET |
| +038+ | 3.55 | Mike Leake | 147.7 | CIN |
| +045+ | 3.34 | Hyun-Jin Ryu | 148.3 | LAN |
| +046+ | 3.33 | Jordan Zimmermann | 158 | WAS |
| +051+ | 3.2 | Chad Gaudin | 93 | SFN |
| +050+ | 3.2 | Bartolo Colon | 154.3 | OAK |
| +049+ | 3.2 | Travis Wood | 153 | CHN |
| +054+ | 3.15 | Hisashi Iwakuma | 164 | SEA |
| +057+ | 3.07 | Mat Latos | 154 | CIN |
| +059+ | 3.06 | Francisco Liriano | 114 | PIT |
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