Dorsey suffered a torn ACL in Sunday's loss to the Seahawks, according to NFL Network's Rand Getlin. Assuming the diagnosis is confirmed by the team, Dorsey would presumably be headed to IR, with his looming absence representing a big blow to the 49ers' defensive line.
The 49ers announced several roster moves prior to Sunday's game against Seattle, per the team's official website. The team placed linebacker NaVorro Bowman (knee) and defensive lineman Glenn Dorsey (forearm) on the injured reserve list. In a corresponding move, San Francisco promoted cornerback Marcus Cromartie and guard Andrew Tiller to the 53-man active roster from the team's practice squad.
The 49ers have ruled four of the 11 players listed on its final injury report for Week 15 against Seattle. Those four include linebacker NaVorro Bowman (knee), tackle Anthony Davis (concussion), defensive tackle Glenn Dorsey (forearm) and wide receiver Steve Johnson (knee). Cornerback Tramaine Brock (hamstring), cornerback Chris Culliver (knee), center Marcus Martin (knee) and safety Raymond Ventrone (groin) were deemed questionable. Meanwhile, guard Mike Iupati (elbow), defensive end Ray McDonald (finger) and defensive end Justin Smith (back) were labeled as probable.
The 49ers have listed QB Josh Johnson, S Bubba Ventrone , CB Tramaine Brock, OL Anthony Davis, WR Brandon Lloyd, TE Vance McDonald and DL Glenn Dorsey as inactive Week 14 against the Raiders. Both Dorsey and McDonald had been ruled out prior to Sunday. Brock and Ventrone came into the contest listed as questionable. Ventrone has a groin injury. Brock has a hamstring issue. Lloyd was probable due to a quad injury, but will not play.
The 49ers released their final Week 14 injury report and listed RB Carlos Hyde (shoulder), CB Chris Culliver (shoulder), DT Ray McDonald (finger), WR Michael Crabtree (knee), DE Justin Smith (back), WR Bruce Ellington (ankle), WR Steve Johnson (knee), WR Brandon Lloyd (quadricep) and OT Joe Staley (illness) as probable. Cornerback Tramaine Brock (hamstring) and safety Raymond Ventrone (groin) are listed as questionable. Offensive tackle Anthony Davis (concussion), defensive tackle Glenn Dorsey (forearm) and tight end Vance McDonald (back) were ruled out. The 49ers take on the Raiders Week 14.