| Starter | Tm | Tier | Game |
|---|---|---|---|
| Barry Zito | SFN | -6.12 | 201309020_SFN_SDN |
| Ian Kennedy | SDN | -4.58 | 201309020_SFN_SDN |
| Joe Saunders | SEA | -4.25 | 201308310_SEA_HOU |
| Mike Pelfrey | MIN | -2.57 | 201308310_MIN_TEX |
| Phil Hughes | NYA | -2.29 | 201309020_CHA_NYA |
Based on accumulated WAA for this season up to 2013-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.66 | Clayton Kershaw | 209 | LAN |
| +008+ | 5.64 | Jose Fernandez | 158.7 | MIA |
| +017+ | 4.64 | Yu Darvish | 174.7 | TEX |
| +025+ | 4.14 | Hisashi Iwakuma | 191 | SEA |
| +026+ | 4.13 | Anibal Sanchez | 151.3 | DET |
| +029+ | 4.07 | Madison Bumgarner | 176.3 | SFN |
| +030+ | 4.06 | Max Scherzer | 183.3 | DET |
| +031+ | 4.04 | Hiroki Kuroda | 171.3 | NYA |
| +032+ | 3.99 | James Shields | 196 | KCA |
| +035+ | 3.96 | Stephen Strasburg | 164 | WAS |
| +037+ | 3.94 | Mat Latos | 184 | CIN |
| +043+ | 3.86 | Francisco Liriano | 133 | PIT |
| +045+ | 3.81 | Felix Hernandez | 194.3 | SEA |
| +046+ | 3.78 | Zack Greinke | 148.7 | LAN |
| +049+ | 3.66 | Chris Sale | 180.3 | CHA |
| +050+ | 3.65 | Adam Wainwright | 206.7 | SLN |
| +051+ | 3.51 | Cliff Lee | 183.7 | PHI |
| +053+ | 3.5 | Bartolo Colon | 159.3 | OAK |
| +055+ | 3.45 | Derek Holland | 184.7 | TEX |
| +056+ | 3.42 | Patrick Corbin | 182.7 | ARI |
| +057+ | 3.36 | Jhoulys Chacin | 169.3 | COL |
| +060+ | 3.34 | Hyun-Jin Ryu | 167 | LAN |
| +064+ | 3.23 | Julio Teheran | 161.3 | ATL |
| +065+ | 3.2 | Mike Minor | 172.7 | ATL |
| +070+ | 3.01 | Ervin Santana | 180.7 | KCA |
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