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Ryan Vogelsong- 10-5, 2.63 ERA, 1.27 WHIP, 112 K's, 147 IP - At the age of 34, Ryan Vogelsong is putting together the best season of his career and deserves a lot of credit for it. Although Vogelsong's numbers are very attractive, he does not have a lot of innings pitched. Had Vogelsong racked up more innings, he would be a top contender.
Shaun Marcum- 11-5, 3.24 ERA, 1.12 WHIP, 135 K's, 169.1 IP - Despite the recent surge of the Milwaukee Brewers, Marcum does not get much attention by most fans. He ranks ninth in the league in WHIP while holding solid numbers in the other categories. Marcum is definitely less likely to win it, but he deserves to be recognized for the season he has put together.
Johnny Cueto- 9-5, 2.05 ERA, 1.06 WHIP, 97 K's, 140.1 IP- There is no doubt that Johnny Cueto has been nothing but flawless since returning in May. In previous seasons, he gave up a lot of home runs, however it seems as if Cueto has learned what to do and it definitely helped him improve. What really kills Cueto is clearly his lack of innings pitched compared to the other pitchers. If Cueto started the season healthy, I think he would be a top five candidate.
Zack Greinke- 13-5, 4.05 ERA, 1.14 WHIP, 162 K's, 135.2 IP - In his first season with the Brew Crew, Greinke definitely had success. Despite his high ERA, he ranks seventh in the NL in strikeouts. But what makes that even more respectable is that he has only started in 21 games, opposed to those ahead of him who have at least 25 starts.
To be honest, all of these guys could make a case to crash the top ten. And although most may be more dominant than a few others that pop up, the reason why I left most of these guys out was because of their lack of innings pitched.