Look at his career Minor League Numbers
They aren't anything special, he never got past A ball and didn't show very good control at all. He was a rule V pick from the Cubs, and that's the only reason that he's in the Major Leagues is because if they send him down he goes back to CHC.
The kid has always had plenty of potential and I don't understand why CHC didn't keep him,but I don't see him making an impact this year for fantasy leaguers unless in very large leagues.
Yeah, but there's a clear reason for that. His stuff is insanely good and from a 6'10" height, the ball looks even faster. He pitched at 92-94 coming out of HS, but was only at 87-89 last season because he wasn't conditioned...he didn't follow offseason workouts as he should've. It looks like he has solved those issues with a good season this year. Scouts actually thought he had MORE to add to his HS velocity, believe it or not. In addition, his control was off last season. Control has always been one of the main concerns with him.
He has some maturity and off-the-field issues, but his upside as an ace is undeniable.