The Lions signed CB Ron Bartell and placed Jacob Lacey on injured reserve.
Bartell played in six games this season for the Raiders — he spent time on the short-term injured reserve list with a shoulder injury. In those six games, Bartell had 18 tackles and four passes defensed before he was released.
Bartell played in one game for the Rams last season. From 2007-10 he played in 62 games with 56 starts. He has 58 career passes defensed.
Lacey played in 11 games with nine starts this season and had 36 tackles, four passes defensed and one interception.