Detroit Lions coach Jim Schwartz told the Detroit Free Press Monday he had no comment on an MRI taken on quarterback Matthew Stafford. Stafford left Sunday's game against the Tennessee Titans in the fourth quarter with a leg injury. Shaun Hill took over for Stafford with the Lions trailing. He forced the game into overtime on a Hail Mary at the end of regulation. The Titans eventually won the wild 44-41 contest. Hill would likely start Sunday against the Minnesota Vikings if Stafford cannot play but Schwartz said he would not make that decision until Friday. The injury was initially labeled as a muscle strain or pull that occurred during practice last week.