That is a good point. Still, 80 wrc+ is not a black hole for a catcher. I think you'd see a black hole if Garneau became the starting catcher for a full season. Given Barnhart's 80 wrc+, his platoonability, his good defensive repuation and the fact that they didn't give up anything of value, I'd say it looked like a pretty good move. Of course, if his defensive reputation is not real or his offense falls off the cliff, he won't help them.