Left tackle Joe Staley went through a week of limited practice due to a hamstring injury that sidelined him the past three games. He is listed as questionable for the 49ers' season finale on Sunday against the Seattle Seahawks at Levi's Stadium.
Guard Andrew Tiller, who started the past two games at left guard, will not be available because of an ankle injury, the team announced. Backup center Marcus Martin is also not available for the game with an ankle injury.
If Staley returns to action on Sunday, Trent Brown would move back to right tackle. Zane Beadles could get his second start at center, which would leave the 49ers with several options at left guard, including rookie Alex Balducci and late-season addition Andrew Gardner. Rookie Joshua Garnett will start at right guard.
Cornerbacks Rashard Robinson, who sealed the 49ers' victory last week over the Los Angeles Rams with his first career interception, is listed as questionable with a hamstring injury.
49ERS
Out
C Marcus Martin (ankle)
G Andrew Tiller (ankle)
Questionable
CB Dontae Johnson (groin)
CB Rashard Robinson (hamstring)
T Joe Staley (hamstring)
SEAHAWKS
Out
RB C.J. Prosise (shoulder)
