Phoenix Pinnacle four-star pro-style quarterback JD Johnson committed to Michigan in December of last year, which was just a few weeks before new offensive coordinator Josh Gattis was hired. It's been well documented this spring that Gattis is changing things in a big way in Ann Arbor so it was very important for the 6-4, 187-pound Johnson to get back on campus in an official capacity and spend some time with U-M's new offensive mind.