Michigan quarterback commit J.D. Johnson announced his playing career is over because of an issue with his heart.
The three-star prospect in the 2020 class tweeted that a recent evaluation by doctors discovered issues that could not be corrected by surgery.
Johnson is a pocket-passing quarterback out of Pinnacle High School in Phoenix and had appeared on the Netflix documentary "QB1: Beyond the Lights" with former teammate Spencer Rattler during their 2018 season.
The heart issue is called coarctation of the aorta, which was diagnosed when Johnson was 12. He was scheduled to receive an expansion adjustment to the original stent, but upon evaluation doctors found complications.