Jason Castro is out for three months following surgery to remove the sesamoid bone in his left food.
Jon Heyman (I know) already says that the Astros and Pudge - yes, that Pudge, could be a fit. Although I really hope not.
Regardless, the timetable for Castro's return should put him back right around the middle of Spring Training. Get ready for Quintero Time (who signed a 1-year deal worth $1m + bonuses).