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 No. 1 Player In Ohio Snubs Buckeyes On Major Announcement Michigan The Favorite To Land Top Offensive Lineman From Hawaii Is An SEC Team The Favorite To Land No. 1 Recruit Jackson Cantwell? Another B1G School, Not Michigan, Now Favorites To Land Top QB Recruit? OSU Loses Out To Clemson For Top In-State Recruit A Day After Winning Another