Michigan quarterback Brandon Peters is in concussion protocol after taking a hard hit at Wisconsin last Saturday and his availability the upcoming rivalry game against Ohio State is uncertain. “He’ll be coming in shortly,” Michigan coach Jim Harbaugh said Monday. “He was seen (Sunday) and we’ll see where he’s at today.” Wilton Speight, out since fracturing three vertebrae in the Purdue game Sept. 23, practiced last week but was not cleared for contact. “He’ll be evaluated again by the doctors this week to see if he would be cleared for contact,” Harbaugh said. If Peters can’t go, John O’Korn will start. “John has remained diligent every single week to preparation and the game plan, always sitting on a spring ready to play,” Harbaugh said.