Michigan Wolverines offensive line coach Ed Warinner speaks to the media on Wednesday, Oct. 30, 2019, in Ann Arbor. Orion Sang, Detroit Free Press
Michigan football quarterback 2020 commit JD Johnson announced Wednesday that he is medically retiring from football.
In a statement posted to Twitter, Johnson — a three-star prospect from Phoenix, Arizona, committed to the Wolverines' 2020 class — wrote that he was born with a coarctation of his aorta. He received a stent following his diagnosis at age 12 and was due for "an expansion adjustment" to the stent in December.
However, subsequent tests and evaluations have revealed issues that cannot be corrected through surgery.