By Chris Rosvoglou Just a few days ago, the San Francisco 49ers worked out offensive linemen Jordan Mills, Tyree St. Louis and Caleb Benenoch. On Saturday, the team reportedly signed one of them to a contract. According to Aaron Wilson of Pro Football Network, the 49ers signed Mills. Mills, a former fifth-round pick out of Louisiana Tech, started his NFL career with the Chicago Bears. He then had brief stints with the Dallas Cowboys and Detroit Lions before spending multiple seasons with the Buffalo Bills. Last season, Mills made 10 appearances for the New Orleans Saints. He started in three o…