Husker senior running back Rex Burkhead is questionable for Saturday’s crucial home clash with Michigan. Burkhead re-aggravated the left knee injury he initially suffered in the season opener against Southern Mississippi and that knocked him out of the Ohio State game. At his press conference yesterday, Husker head coach Bo Pelini called Burkhead ‘day-to-day’ and said this injury was less severe than it had been two weeks ago. The Huskers and Wolverines kick off at 7 PM Saturday night.