Michigan coach Jim Harbaugh said that his playing status for Friday's game remains questionable as he continues "working through something right now."
"We'll know more today whether he'll be able to play," Harbaugh said during Thursday's news conference.
Hill, a sophomore, ranks second on the team with 65 tackles. He has two interceptions and is tied for the team lead in pass breakups with seven.
"You know, it's not our job to comment on other players, so we'll let Coach Harbaugh answer that question," McNamara said.
Michigan boasts one of the best defenses in college football, ranking fourth among FBS teams in points per game allowed (16.08).