Detroit Lions wide receiver Calvin Johnson was limited with a knee injury in Thursday's practice while defensive end Cliff Avril did not practice.
Avril did not practice due to a back problem, he leads the Lions with 4.5 sacks this season. Also missing practice for the Lions on Thursday were linebacker DeAndre Levy (hamstring), cornerback Jacob Lacey (concussion), and safety Amari Spievey (concussion). Spievey suffered a concussion in the Lions loss to the Chicago Bears on Monday and Lacey missed the Bears game after suffering a concussion against the Philadelphia Eagles on Oct. 14. Detroit could be missing both players when they take on the Seahawks on Sunday.
Calvin Johnson was limited due to a knee injury he tweaked against the Bears. Also limited on Thursday were cornerback Bill Bentley (shoulder), safety Louis Delmas (knee), tight end Brandon Pettigrew (knee), linebacker Stephen Tulloch (knee), defensive tackle Corey Williams (knee), and wide receiver Titus Young (knee).