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 Michigan Offensive Starter Announces Return For Final Season Former Five-Star Recruit Part Ways With B1G Program After Just A Few Hours Ohio State Misses Out On Top Transfer Portal Target To SEC Program B1G Program Lands The Top Ranked Uncommitted Transfer Portal Player Michigan Player Who Entered Transfer Portal Decides To Stay With Program