I'll vote for Dean Kiekhefer.
Lefty reliever is a premium position. Looks pretty good so far. Seems to have mastered control. 4 walks in 60 innings kept his WHIP down. Gives up a hit an inning.
I don't know what to think about Rahmatulla's offensive nosedive at Palm Beach. With a .180 BABIP he must have been rolling them out there.