An MRI revealed that Denver Broncos offensive tackle Ryan Clady has a Lisfranc sprain to his left ankle, and it's unclear when he will be able to return, the Denver Post reported Monday.
According to NFL.com's Ian Rapoport, the injury might sideline Clady for an extended period, and the Broncos fear it could end Clady's season.
The prognosis for Clady, a two-time All-Pro, remains unclear, and he will seek additional medical opinions to get a better idea of the extent of the injury.
Clady has never missed a game since he was selected in the first round of the 2008 NFL Draft by the Broncos.
Clady protects the blind side of quarterback Peyton Manning.