The Chargers retained backup center Cory Withrow, agreeing to terms on a three-year contract with the unrestricted free agent.

Withrow, 31, played in 11 games last season, seeing most of his action on special teams. He played his first six NFL seasons with the Minnesota Vikings.

"Cory is a solid, experienced veteran who provides reliable depth for us along the offensive line," general manager A.J. Smith said on the team's Web site.