The San Francisco 49ers released Jeremy Zuttah on Wednesday, less than five months after acquiring the Pro Bowl center from the Baltimore Ravens.Linebacker Sean Porter was signed to a one-year deal to take the roster spot of Zuttah, who was expected to compete with incumbent Daniel Kilgore for the 49ers’ starting job. Kilgore easily claimed the role and the 31-year-old Zuttah then saw second-team center snaps shift to the versatile Tim Barnes, who is also a guard.Zuttah played both guard and center during his nine NFL seasons, and made 41 starts at center for Baltimore over the past three campaigns. He appeared in 131 contests with the Tampa Bay Buccaneers and Ravens.Porter, who was a fourth-round pick of the Cincinnati Bengals in the 2013 draft, spent time on the Jacksonville Jaguars’ practice squad last season before being promoted to the active roster. The 26-year-old played in two games in 2016 before being released on May 1.