McDuffie (neck) is active for Saturday's divisional-round game against the 49ers, Mike Spofford of the Packers' official site reports.
McDuffie was listed as a limited participant in Wednesday's walkthrough and Thursday's practice and is good to go for Saturday's contest. He sustained the neck injury in the Packers' wild-card win over the Cowboys. McDuffie played 21 snaps -- 15 on defense, nine on special teams -- against Dallas and finished with six tackles (five solo).