Play was stopped as sophomore guard Gary Harris stopped at the offensive end of the court. He came over to the bench and was having his left shoulder checked on by the medical staff.
"I got hit with a screen," he said. "It was nothing serious. I was about to go back in but the coaches wouldn't put me back in just to be cautious. I was fine, though."
The All-Big Ten Tournament selection had 15 points in the win, including a big dunk at the end of the first half to extend Michigan State's lead to nine.
Coach Tom Izzo said the injury is nothing to worry about and it was just a stinger.
"I'm not sure but I know it was good enough for him to go back in," Izzo said. "It didn't pop out or anything. He just tweaked it. He's done that a lot last year, it hasn't happened this year, but it didn't sound like it was anything that he was worried about or the doctors were worried about."
Harris also had three steals and a block against the Wolverines.
Michigan State opens NCAA Tournament play against Delaware at 4:40 p.m. ET Thursday in Spokane, Wash.