The 49ers originally signed Fuller (5-11, 175) to the team’s practice squad on December 16, 2014. He was promoted to the active roster on December 26 and was active for the team’s final game against the Arizona Cardinals.
The 49ers acquired Martin (6-5, 312) in a trade with the Miami Dolphins on March 11, 2014. He appeared in 15 games (nine starts) for the 49ers last season. Prior to joining San Francisco, Martin spent two seasons with the Dolphins.