It means they don't know if the starting quarterbacks will even be available if they play Ohio State, if the game can even be played. It has nothing to do with Michigan deciding not to play.
To all of you commenting things like “race shouldn’t matter” and “it should only be about his ability to coach football.”
I agree! That’s why we’re celebrating the fact that after a long and unfortunately history where people thought it did matter, he’s helping prove it doesn’t, even in 2020.