Michigan Michigan Pledge Shares He Has Medically Retired From Football Published October 30, 2019 Michigan 2020 QB pledge JD Johnson shared that he will have to medically retire from football after finding out that he had an undiagnosed heart defect: Next Chapter#GoBlue pic.twitter.com/vNqVO9agib — JD Johnson (@jd10johnson) October 30, 2019 We wish Johnson, a four-star out of Arizona, the best of luck moving forward. In this article: Recent Posts Looks Like SEC School Has Overtaken Michigan To Flip A Top WR Committed To LSU One Of Nation’s Top Defenders Hinting A Michigan Commitment? Michigan Predicted To Flip One Of Clemson’s Top Commits OSU Starter Taking Note Of A Notable Comment Michigan Player Made After Win Last Year OSU Loses Another Top Recruit Ahead Of The Game