The 49ers filled their only roster opening Monday by signing safety Darcel McBath, a second-round pick by the Denver Broncos in 2009.
McBath fizzled in Denver, and he was cut by the Jacksonville Jaguars in April.
The 49ers now are at the 90-player limit for training camp, which opens Friday in Santa Clara.
McBath (6-foot-1, 200 pounds) joins a safety group that is waiting for one of its starters, Dashon Goldson, to sign the franchise tender offered in February. Last week, a deadline passed for Goldson to sign a multiyear deal with the team. Now his only options are to sign the one-year tender worth $6.2 million or not play this season. Goldson seemed resigned to playing under the one-year deal during a recent interview.
The other safeties on the roster include Donte Whitner, C.J. Spillman, sixth-round pick Trenton Robinson, Mark LeGree, Cory Nelms, Colin Jones and undrafted rookie Michael Thomas.
McBath, 26, played at Texas Tech with Michael Crabtree. As a senior, McBath tied for third in the NCAA with seven interceptions. He also was a Denver teammate of cornerback Perrish Cox, who signed with the 49ers in March. Cox impressed during spring practices and is fighting for a role in the secondary.
Cox and McBath played under 49ers secondary coach Ed Donatell in Denver.