John T. Greilick /The Detroit News

Michigan QB Ryan Mallet shakes a Northwestern pass rusher in the backfield before scrambling for seven yards on this second-quarter play. Mallett struggled after replacing starter Chad Henne. He played the rest of the first half after Henne's scoring drive on Michigan's first possession. Mallett completed five of 11 passes for 67 yards and no interceptions or touchdowns. Michigan trailed 16-7, before Chad Henne returned in the second half to lead the comeback.