CB Tyson Smith (who came back from a stroke during the 2016 season to play last season) had a medical setback, and is not going to play this year. If you are 20 and have had a stroke, with lasting impacts two years later, I think it might be time to move onto the non-football chapter of your life. Just my 2 cents.
He was certainly in the two deep, and figured to see the field plenty, so while not a starter, it's a depth ding for sure.