His arse needs to learn 3b in a hurry. I seriously don't know what they can do with him. It would be a shame to only use him as a bench bat or to send his old arse back to the minors. He would be an upgrade offensively right now over Uggla at 2nd assuming Uggla remains shitty this year.
I can't remember if it was Bowman or DOB, but one of them said that Gattis isn't physically capable of playing 3B. I see no problem with using him as a bench bat this year, seeing how it works out, and letting him and Bethancourt fight for the starting catcher spot next spring. There is very little chance that McCann is a Barve in 2014, so this is probably the FO's plan.