SANTA CLARA, Calif. - If the 49ers are going to upset one of the league's best defenses Sunday, they're going to do it without two key offensive players.
Receiver Stevie Johnson (knee) and right tackle Anthony Davis (concussion) Friday were officially ruled out of Sunday's game against the Seattle Seahawks, which is a must-win if San Francisco is going to keep its razor thin playoff hopes alive.
Davis will miss his ninth game of the season after suffering a concussion late in Nov. 16's win over the New York Giants. He was a limited participant in practice this week, wearing a blue no-contact jersey in all three practices.
With just three games left and Davis still feeling symptomatic nearly a month removed from the concussion, it's getting to the point where getting shut down for the season could be the prudent thing to do for Davis' long-term health.
"It’s always a concern when you’re talking about the head, or about the spine, the heart," Jim Harbaugh said Friday. "Those are always big concerns.”
Johnson did not practice all week, but he did dress and participate in warm up sessions open to the media. He will miss his first game of the year after making 35 catches for 435 yards and three touchdowns.
NaVorro Bowman (knee) and Glenn Dorsey (forearm) will not make their season debuts Sunday, as expected. Dorsey continued to work his back from a biceps tendon tear suffered early in training camp that hasn't recovered as quickly as anticipated.
"Nothing’s really changed from this week from last week. Yes, he’s on the 53, but he didn’t practice yesterday, so, I don’t see a big change yet,” defensive coordinator Vic Fanio said Thursday.
Bowman is expected to make his practice debut next week after continuing to rehab after being put on the active roster.
"I’m going to get out there when I feel 100 percent. Let’s be clear on that," Bowman said this week. "But like I said, throughout this rehab process, I’ve been doing everything to get me this far. Now it’s time for some football activity, some quick-reaction, things like that."
Rookie center Marcus Martin missed practice Wednesday, but was limited in Thursday and Friday's sessions. He sustained a knee injury in last week's loss to the Oakland Raiders, forcing reserve interior lineman Joe Looney to take over. If Martin cannot play, it's likely Looney would resume that role against Sunday in noisy CenturyLink Field. Dillon Farrell is also a possibility.
49ers injury report:
OUT: LB Navorro Bowman (knee), T Anthony Davis (concussion), DT Glenn Dorsey (forearm), WR Steve Johnson (knee)
Seahawks Injury report:
OUT: DE Demarcus Dobbs (ankle)
DOUBTFUL: C Max Unger (knee, ankle)
QUESTIONABLE: TE Cooper Helfet (ankle)
PROBABLE: CB Jeremy Lane (glute), RB Marshawn Lynch (back)