Well, he'd probably clear waivers, think he'd refuse the assignment? 
This is still a guy who made the All-Star team last year and had a .788 OPS even after a less impressive second half. I'm not a fan, it was a terrible signing, and his bat has to be close to elite to make up for him even being in the field (which is now what he was supposed to do when they signed him) but he's probably not cooked either. We don't even get to complain about his terrible NLCS if he doesn't help get them into that round to begin with.