Very good deal for the Yankees. I do think the durability concerns are legitimate. Its not just that he has had a lot of small injuries. Its also that, having never pitched 170 innings in a season in his career, nobody has any real clue how his arm will hold up if he happens to throw 200 next year. This would obviously be a big concern in the post-season. But even with these concerns they got two cost controlled years of a top 20-25ish starter in the league for a prospect that was good but not a worldbeater and a couple warm bodies.