| Starter | Tm | Tier | Game |
|---|---|---|---|
| Clayton Kershaw | LAN | 12.35 | 201305200_LAN_MIL |
| Felix Hernandez | SEA | 7.34 | 201305190_SEA_CLE |
| Johnny Cueto | CIN | 4.16 | 201305200_CIN_NYN |
| CC Sabathia | NYA | 2.69 | 201305200_NYA_BAL |
| Doug Fister | DET | 2.52 | 201305190_DET_TEX |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Phil Hughes | NYA | -2.78 | 201305210_NYA_BAL |
| Mike Pelfrey | MIN | -2.62 | 201305210_MIN_ATL |
| Edinson Volquez | SDN | -2.58 | 201305210_SLN_SDN |
| Felix Doubront | BOS | -2.13 | 201305210_BOS_CHA |
| Ricky Nolasco | MIA | -1.87 | 201305190_ARI_MIA |
Based on accumulated WAA for this season up to 2013-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.6 | Clayton Kershaw | 73.3 | LAN |
| +003+ | 3.73 | Jordan Zimmermann | 66.7 | WAS |
| +004+ | 3.55 | Matt Harvey | 63.7 | NYN |
| +005+ | 3.49 | Patrick Corbin | 62.3 | ARI |
| +006+ | 3.38 | Clay Buchholz | 65.7 | BOS |
| +007+ | 3.15 | Felix Hernandez | 69.7 | SEA |
| +009+ | 2.93 | Shelby Miller | 57 | SLN |
| +011+ | 2.67 | Hiroki Kuroda | 58.7 | NYA |
| +013+ | 2.63 | Adam Wainwright | 72 | SLN |
| +014+ | 2.47 | Hisashi Iwakuma | 64.7 | SEA |
| +015+ | 2.46 | Travis Wood | 60.3 | CHN |
| +016+ | 2.4 | James Shields | 66 | KCA |
| +021+ | 2.22 | Matt Moore | 55 | TBA |
| +023+ | 2.18 | Chris Sale | 64 | CHA |
| +027+ | 2.07 | Scott Feldman | 49.3 | CHN |
| +028+ | 2.06 | A.J. Burnett | 63 | PIT |
| +029+ | 2.04 | Stephen Strasburg | 64.3 | WAS |
| +035+ | 1.86 | Justin Masterson | 70 | CLE |
| +036+ | 1.84 | Trevor Cahill | 58 | ARI |
| +038+ | 1.81 | Yu Darvish | 66.7 | TEX |
| +042+ | 1.79 | Cliff Lee | 63.7 | PHI |
| +044+ | 1.78 | Alex Cobb | 59.3 | TBA |
| +045+ | 1.72 | Kyle Kendrick | 60.7 | PHI |
| +050+ | 1.66 | Mike Minor | 58.3 | ATL |
| +053+ | 1.61 | Ervin Santana | 55.3 | KCA |
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