Kelly Johnson splits data:
2014 OPS against righties .653
2014 OPS against lefties .708
Career OPS against righties .751
Career OPS against lefties .768
I think he can help us more than the other options being discussed here (Descalso, Callaspo, Juan), but given the reverse splits he is not an ideal guy to use in a platoon. What he does is provide insurance at multiple positions where we are weak. Second. Third. Even catcher indirectly in a scenario where Bethancourt doesn't hit well enough and Gattis ends up catching again.