In the Lions' injury report released Friday afternoon, safety Amari Spievey (concussion) and defensive tackle Corey Williams (knee) both did not practice at all this week and were officially listed as out for Sunday's contest on Friday.
Detroit's secondary could possibly be short another safety, as Louis Delmas (knee) also did not practice this week, but was listed as doubtful on Friday. Cornerback Chris Houston (ankle) and wide receiver Calvin Johnson (knee) were limited in practice for much of the week, and are listed as questionable for Sunday's divisional showdown.
For the Packers, defensive mainstays Clay Matthews (hamstring) and Charles Woodson (collarbone) will not play Sunday, while cornerback Sam Shields (ankle) was limited all week in practice and was listed Friday as questionable. Wide receiver Jordy Nelson, with hamstring and foot injuries, was also a limited participant in practice this week but is listed as probable to play in Sunday's game.