Detroit Lions coach Jim Schwartz told the Detroit Free Press Monday he had no comment on an MRI taken on quarterback Matthew Stafford.
Stafford has a hamstring injury, NBCSports.com reported, based on a league source, and he is expected to be OK.
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.