Joel Pineiro. His 7-9 record is very misleading. It is a factor in the Cardinals less then amazing offense this year.
He has 11 quality starts in 17 starts, and has a decision in 16 of 17 games. Joel leads the NL in fewest homers allowed, with three. To put that in perspective, Paul Konerko hit three homers two days ago. He has two shutouts and three complete games. He has a 1.11 WHIP, 3.20 ERA, and .267 BAA. In 115.1 innings he has given up just 12 walks, with zero intentional walks.
This is turning into an All-Star caliber season (with more run support he would have at least 10 wins). Joel and Lincecum are the only ones I am tagging right now that could win the NL Cy Young (especially with the corupt voting!).