According to Dave Birkett of the Detroit Free Press, safety Amari Spievey won’t play Sunday because of a concussion suffered in Monday’s loss to the Chicago Bears. The 24-year-old has appeared in five games this season, racking up 21 tackles in the process.
Cornerback Jacob Lacey is also likely to miss Sunday’s game. Lacey suffered a concussion in the Lions win over the Philadelphia Eagles on Oct. 15 and has yet to return to practice, according to Birkett.
Cliff Avril (back) and DeAndre Levy (hamstring) also missed practice Thursday.
On offense, a number of Matthew Stafford’s weapons have been limited in practice.
Wide receiver Titus Young and tight end Brandon Pettigrew were also limited because of knee injuries.
For an offense that scored only seven points against Chicago and lost Nate Burleson for the season, missing one of these players could have a significant impact, especially considering the Seahawks allow an average of 15.1 points per game, good for third in the NFL.
Their offense, however, ranks near the bottom of the league. The Seahawks average only 161.9 passing yards and score just 16.6 points per game.
With that in mind, the Lions defense should still perform well regardless of who's out, but the offense will need to be healthy and in sync for all four quarters.