| Starter | Tm | Tier | Game |
|---|---|---|---|
| Cliff Lee | PHI | 6.96 | 201304200_SLN_PHI |
| Doug Fister | DET | 3.15 | 201304210_DET_ANA |
| James Shields | KCA | 3.14 | 201304200_KCA_BOS |
| Jordan Zimmermann | WAS | 3.01 | 201304210_WAS_NYN |
| Hiroki Kuroda | NYA | 2.87 | 201304200_NYA_TOR |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ubaldo Jimenez | CLE | -6.49 | 201304210_CLE_HOU |
| Edinson Volquez | SDN | -4.22 | 201304190_SDN_SFN |
| Jonathan Sanchez | PIT | -3.66 | 201304210_ATL_PIT |
| Jake Arrieta | BAL | -3.44 | 201304210_LAN_BAL |
| Roberto Hernandez | TBA | -2.47 | 201304210_OAK_TBA |
Based on accumulated WAA for this season up to 2013-04-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.08 | Clay Buchholz | 30 | BOS |
| +003+ | 2.05 | Matt Harvey | 29 | NYN |
| +004+ | 1.78 | Paul Maholm | 26.3 | ATL |
| +015+ | 1.42 | Justin Masterson | 27 | CLE |
| +018+ | 1.41 | Jhoulys Chacin | 24.7 | COL |
| +016+ | 1.41 | Ross Detwiler | 20 | WAS |
| +017+ | 1.41 | Clayton Kershaw | 28.7 | LAN |
| +020+ | 1.36 | Hisashi Iwakuma | 26.7 | SEA |
| +021+ | 1.34 | Carlos Villanueva | 21 | CHN |
| +022+ | 1.33 | Jake Westbrook | 21.7 | SLN |
| +023+ | 1.32 | Mike Minor | 19 | ATL |
| +024+ | 1.3 | Jon Lester | 26 | BOS |
| +025+ | 1.27 | Wandy Rodriguez | 16 | PIT |
| +026+ | 1.25 | Matt Moore | 18 | TBA |
| XXXXX | 1.21 | Yu Darvish | 26.7 | TEX |
| XXXXX | 1.2 | Derek Holland | 22 | TEX |
| XXXXX | 1.19 | Anibal Sanchez | 25.7 | DET |
| XXXXX | 1.16 | Madison Bumgarner | 26.3 | SFN |
| XXXXX | 1.12 | Kevin Slowey | 23.7 | MIA |
| XXXXX | 1.1 | Doug Fister | 27 | DET |
| XXXXX | 1.03 | Kris Medlen | 25 | ATL |
| XXXXX | 1.01 | Travis Wood | 19.7 | CHN |
| XXXXX | 1.01 | Patrick Corbin | 19 | ARI |
| XXXXX | 1 | Ervin Santana | 29 | KCA |
| XXXXX | 0.95 | Justin Verlander | 25.3 | DET |
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