I say Zobrist or Santana. You are good in your outfield. Zobrist is a huge upgrade from Theriot (and he is eligible as a 2B and SS in most leagues). There are question marks however as last year was sort of an anomaly for him. So, you have to ask yourself whether you think he can do the same. If he can, then he is a good pick-up. Santana is a bit older, but is still a solid ace, playing in the NL, in a pitcher-friendly park. Your top pitchers are Lester and then Hamels, so it would be great to upgrade your pitching. Shortstop might be a bit easier to upgrade through the wire or something else (although it is a 20 team league

). My first choice is Santana with my second choice being Zobrist.
Thoughts on my Morneau trade thread?
EDIT: OOPS!!!! I thought I saw Santana, not Sabathia. I say take Sabathia

That is your best choice