The Rams made it official Friday, activating safety Cody Davis from injured reserve and placing outside linebacker Matt Longacre on injured reserve. Davis appeared in six games for the Rams, making 19 tackles, an interception and three pass breakups. He injured his quadriceps against the Jaguars, and the Rams placed him on injured reserve November 3 after the injury lingered. Davis will work into the secondary in Los Angeles’ sub-packages and will resume his role as a core special teams player.