San Francisco 49ers C Marcus Martin (ankle) and OG Andrew Tiller (ankle) did not practice Friday, Dec. 30, and have been ruled out for Week 17. CB Dontae Johnson (groin), CB Rashard Robinson (hamstring) and OT Joe Staley (hamstring) were limited participants and are listed as questionable, and DT Glenn Dorsey (knee, ribs), LB Eli Harold (toe) and DT Quinton Dial (elbow) were full participants and are not listed on the injury report.