3B for Finals

[HeGon]

I currently have Casey Blake, but guys like Adam Kennedy and Alberto Callaspo are available as FAs.
Kennedy's been pretty consistent lately, so I'm trying to figure out who the best option is for this last playoff round that I'm in. 3B's been the iffy part of my lineup all year (started out the season w/ Blalock, if that's any indication).

The rest of my team:
C - Pierzynski
1B - Dunn
2B - Utley
SS - Hanley
3B - Blake
IF - Cuddyer
OF - Werth, Ethier, Markakis, Choo
BN - Ortiz

SP - Beckett, Billingsley, Nolasco, Hanson, De La Rosa, Wolf, Matsuzaka, Buchholz
RP - Street, Soria, Francisco