I watched him a bit with Oakland and I think BTS is being a bit unfair to his stuff but he's absolutely right that sometimes hitters just stop swinging at his secondary pitches and he looks like he doesn't know where he's standing and it's tough to watch. He also gets into a million 3 ball counts. He's a reliable average starter, with his ups and downs, but can be very frustrating to watch. Calling him a junkballer is unfair but he'll have stretches where every hitter is in a full count and no one is swinging at his pitches.