3.00 ERA or lower, 25+ IP (August, September), Contenders (Yankees, Rays, Twins, Rangers, Phillies, Braves, Reds, Padres, Giants, Rockies)
Cole Hamels (Phillies)
Roy Oswalt (Phillies)
Matt Cain (Giants)
This doesn't even include Roy Halladay, who might be the front-runner for the NL Cy Young Award right now (he's 4-0 in September, but he has a 4.55 ERA). This is one of the main reasons why the Phillies are probably the only plausible World Series contender from the NL right now.
Not only do they have the playoff experience and the offensive firepower (unlike the Giants or Padres), the front of their rotation is scary.
Cole Hamels (2008 NLCS and WS MVP) and Roy Oswalt (2005 NLCS MVP) have been great in the postseason. Roy Halladay has never pitched in the postseason, but does anyone think he won't rise to the occasion?
The Phillies won the World Series in 2008 with a starting rotation of Cole Hamels, Brett Myers, Jamie Moyer and Joe Blanton. With NL (finally) having home field advantage, the Phillies might be the favorite to win it all right now.