And before you ask or whine about it, Pablo Sandoval had too many at bats in 2008, not by a lot, but enough to where he's not a "rookie" by Major League Baseball terms (130 ABs or 50 IP), otherwise it's safe to say he wins hands down.
We did have a solid group of rookies in my opinion, 4 of which were necessary to help keep their teams afloat at certain points in the season or at least did their best considering.