Pena will always have a low average. You're not buying high on Zobrist, either...he was great last year...if anything you're getting him low. Assuming you can bear the loss of Oswalt at SP, I'd do it. Zobrist would take Pena's IF spot, and your team already has good power... so you're upgrading there-- then it's Oswalt/Dunn for Adrian, which is close. I take it.
OF. R. Davis
Bn. Yunel, Freeman
SP. Verlander, Felix, Shields, B. Anderson, Bedard, Danks, Nolasco, Garza
RP. Kimbrel, Bailey, Melancon, Venters