The Lions claimed CB Jerome Murphy off waivers from the Saints and released CB Kevin Barnes.
Murphy, a third-round pick by the Rams in 2010, played in 14 games as a rookie with 30 tackles, an interception and three passes defensed. He was on injured reserve last season with a broken ankle.
Murphy appeared in the Saints’ first two games of the season, recording three tackles, and was released earlier on Tuesday.
Barnes played in 14 snaps for Detroit in Sunday’s loss to the 49ers. The Lions are going to be without CB Drayton Florence (broken arm) for an extended period of time, but could get CBs Chris Houston and Bill Bentley back from injuries.