I would say Adam Wainwright. Followed by Bumgarner.

Wainwright numbers: WAR of 6.4, ERA 2.38, 20 Wins, 1.03 WHIP, 227 Innings Pitched.

Man... Kershaw is beast to beat these numbers.

ESPN has a predictor algorithm. They say Cueto would be the runner up. http://espn.go.com/mlb/features/cyyoung

and then he gets smoked game 1 sigh