I was really concerned after the first inning, but good god, he pitched a great game afterwards. What a curve.
Radio guys have been covering his mechanic changes. Apparently, he has only changed the delivery on his fastball to protect his shoulder. The mechanical changes have caused wildness in his fastball. His breaking pitches he throws with his normal delivery.
From my own assumptions, it usually takes a few batters for a lot of pitchers to really get their breaking pitches going. And hence why he has really struggled early. I'd guess this early inning issues will go away as he gets more used to the delivery change and can rely on his fastball early in the game.