Due to the often selected RH hitting favored parks, and lots of RH power, lefty starters don't seem to be doing as well as their cards would indicate.
The two parks that favor lefties have drawbacks:
Yankee Stadium: not enough LH power hitters to go around to take advantage of this park unless you get lucky
Forbes: no HRs anywhere and RH singles are still 1-9.
I put together some heavily weighted LH starters teams in Forbes and they are not doing nearly as well as lefty starters did in Dunn.
Anyone out there had good stats with lefty starters, particulalry in Forbes and Yankee Stadium?