Phoenix (Ariz.) Pinnacle four-star pro-style quarterback JD Johnson announced via Twitter that he would be medically retiring from football due to a heart issue.

Unfortunately for the 6-4, 187-pounder he’ll never play at Michigan, but it sounds like he’ll still attend the university and be a part of Jim Harbaugh’s staff from day one.

The big issue here is obviously Johnson’s health, but on the recruiting and football side of things, there are now some question marks surrounding the quarterback position in U-M’s 2020 class.

The Wolverines have only offered 14 quarterbacks, including Johnson, but all of them are currently committed to other programs. Only Marietta (Ga.) High four-star Harrison Bailey, Concord (N.H.) St. Paul’s School four-star Parker McQuarrie and Brentwood (Calif.) Liberty four-star Jay Butterfield ever felt like legitimate Michigan targets, but they’re committed to Tennessee, UCLA and Oregon respectively.

It’ll be really interesting to see if things pick up with any of them or if some new names pop up. There aren’t many uncommitted quarterbacks with a noteworthy recruiting profile so if a new name does come up, it’ll be just that — new.