Washington Redskins cornerback Chris Culliver tore his ACL and MCL in practice Thursday, according to NFL Network's Ian Rapoport.

Head coach Jay Gruden initially described the injury as a tweak, but Culliver was later spotted leaving the locker room on crutches with a brace on his knee.

Culliver headed for an MRI, where he reportedly learned his season is over.

Washington signed Culliver to a four-year, $32-million deal in free agency.