The San Francisco 49ers officially announced the signings of a cornerback and an offensive lineman.

Cornerback Mylan Hicks, an undrafted free agent our of Michigan State was the first. In 2014, he had a career-high 19 tackles, four passes defended, and a sack in nine games for the Spartans. He has played cornerback, safety, and linebacker.

Hicks was one of the free agent cornerbacks invited to tryout for the team over the weekend.

Offensive lineman Renfrow was originally signed by the Arizona Cardinals as an undrafted free agent in 2014. He was waived just over three months later before spending time on the Green Bay Packers' and Seattle Seahawks' practice squads.