It's possible. The Rangers where interested in Saito as well. If they could pick up Saito and Halladay, I think they would be the favorites in the AL West.
Not sure who's contract they would want to shed. Young is the starting 3B. Maybe Blaylock, but you would think they would need his bat. I wouldn't mind a deal in which maybe the Sox help Texas out with some money, and maybe get Chris Davis back. I know he is a huge K threat, but you never know what the Sox staff could do with him. He has legit power.
Texas Gets,
Halladay, Saito+ $
Boston get's,
Chris Davis,
Toronto get's,
Perez, Teagarden, Smoak+ 1 more pitcher?