"It's just inexperience," Collins said. "He probably doesn't pitch as much here as he does in the Minor Leagues. You're more on a schedule there, and as you go a couple of days, you're going to get in a game. And he hasn't been doing that. The thing I like is that his velocity is up, but he's throwing balls right down the plate. He gets behind, and he'll throw a fastball right down the middle and get hurt."
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.