Brooks (ankle) has been ruled out for Thursday's game against the Lions, Wes Hodkiewicz of the Packers' official site reports.
Brooks managed to play through his ankle injury Week 12 against the Vikings and played seven total snaps (four on defense, three on special teams), but he hasn't practiced in any capacity since. His next chance to retake the field will arrive Sunday, Dec. 7 against the Bears in Week 14.