| Starter | Tm | Tier | Game |
|---|---|---|---|
| Edinson Volquez | LAN | -8.81 | 201309040_LAN_COL |
| Jeremy Hellickson | TBA | -4.18 | 201309040_TBA_ANA |
| CC Sabathia | NYA | -3.54 | 201309040_CHA_NYA |
| Roy Halladay | PHI | -3.45 | 201309040_WAS_PHI |
| Joe Saunders | SEA | -3.02 | 201309050_SEA_KCA |
Based on accumulated WAA for this season up to 2013-09-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.76 | Clayton Kershaw | 209 | LAN |
| +008+ | 6.34 | Jose Fernandez | 165.7 | MIA |
| +018+ | 4.63 | Anibal Sanchez | 158.3 | DET |
| +020+ | 4.37 | Max Scherzer | 190.3 | DET |
| +026+ | 4.27 | Madison Bumgarner | 182.3 | SFN |
| +028+ | 4.14 | Yu Darvish | 179.7 | TEX |
| +031+ | 4.09 | Cliff Lee | 191.7 | PHI |
| +032+ | 4.06 | Hisashi Iwakuma | 196.7 | SEA |
| +034+ | 4.03 | Stephen Strasburg | 164 | WAS |
| +035+ | 4.02 | Chris Sale | 187.7 | CHA |
| +042+ | 3.91 | Mat Latos | 184 | CIN |
| +044+ | 3.86 | Zack Greinke | 148.7 | LAN |
| +045+ | 3.85 | Felix Hernandez | 194.3 | SEA |
| +048+ | 3.82 | Hiroki Kuroda | 177.7 | NYA |
| +049+ | 3.8 | Bartolo Colon | 164.3 | OAK |
| +051+ | 3.65 | Adam Wainwright | 206.7 | SLN |
| +053+ | 3.57 | Patrick Corbin | 190.7 | ARI |
| +054+ | 3.54 | Derek Holland | 184.7 | TEX |
| +056+ | 3.49 | Mike Minor | 179.7 | ATL |
| +062+ | 3.23 | Jhoulys Chacin | 176.3 | COL |
| +069+ | 2.99 | Travis Wood | 179 | CHN |
| +080+ | 2.77 | John Lackey | 162.3 | BOS |
| +082+ | 2.72 | Joe Kelly | 101.7 | SLN |
| +081+ | 2.72 | Francisco Liriano | 136 | PIT |
| +087+ | 2.61 | Jordan Zimmermann | 185.3 | WAS |
_