I get the feeling that he just isn't a very good pitcher. NL to AL transition. Was it him or Bumgarner we completely lit up last year?
That being said, if we could add him to our roster and trim some fat off of it in the process while picking up a guy that isn't owed much, he could at the very least be a bit of an innings eater for the remainder of the year (though he never has topped 200 IP in a season).