3.5+ K/BB, 1.05 WHIP or lower, 50+ IP (2011)
David Price (Rays)
Dan Haren (Angels)
Cole Hamels (Phillies)
Jered Weaver (Angels)
Justin Verlander (Tigers) Shaun Marcum (Brewers)
The only pitcher on this list that's a surprise is Shaun Marcum (7-2, 2.68 ERA), who is in his first season with the Brewers. After missing 2009 with Tommy John surgery, he had a quality 2010 with the Blue Jays (13-8, 3.64 ERA), and was traded in December for a minor league prospect.
He is a big reason with the Brewers are surprisingly in first place in the NL Central right now. Marcum has also not gone less than 6 innings in any start since his first of the year on April 2nd (4 IP, 3 ER). There is no reason to think he'll let up either, considering that he's only allowed 69 hits and 23 walks in 90.2 innings, along with 83 SO.