I think it's Tanaka's option. So basically if he opts out in four years that's probably a good thing, means he's been pitching well (and wants more money, obviously ). If he doesn't opt out then that will likely mean he didn't do so hot. Well, I was convinced that Project 189 was still a thing, but clearly I was wrong. Good on the Yankees for getting him, but I still think they need a lot more help in their infield.