San Francisco 49ers DT Quinton Dial (back), SS Jaquiski Tartt (knee), LB Michael Wilhoite (ankle) did not participate in practice Thursday, Dec. 31. DT Arik Armstead (shoulder, shin), C Marcus Martin (concussion), FB Bruce Miller (foot), OT Erik Pears (knee) and OT Joe Staley (knee, illness) were limited participants, and LB NaVorro Bowman (shoulder, finger), CB Tramaine Brock (hamstring), LB Ahmad Brooks (shoulder, back), OG Trent Brown (knee), LB Eli Harold (finger), CB Dontae Johnson (ankle) and FS Eric Reid (hip) practiced in full.