As a White Sox fan, we are pretty excited about this kid. What the previous poster said is correct, he has a great fastball but his secondary pitchers are not where they need to be. When his slider is working he is dominating, but if he isn't locating it, he can get in trouble. He is working on a change-up and curveball I believe as well. Once he can get one of the secondary pitches consistent and can have an above average 3rd pitch, he will be in the majors, until then he will stay in AA. I don't think he'll need a stop in AAA if things look good!