The 49ers signed one of their own free agents, offensive tackle Garry Gilliam, to a two-year contract on Tuesday.
Gilliam served as the team's backup tackle last season, a role he'll likely have again in 2018. Joe Staley is expected to man the left side while Trent Brown plays on the right.
Brown, however, is not signed beyond the upcoming season and had surgery to repair a torn labrum (shoulder) in December. Gilliam, 27, likely will fill in during spring practices while Brown recovers.
Including the playoffs, Gilliam had started 34 games for the Seattle Seahawks before the 49ers picked him up last offseason.