Rob Ryan was hired by the St. Louis Rams on Friday to be their defensive coordinator, according to the New York Post.
Ryan was fired as the Dallas Cowboys' defensive coordinator this week.
The Rams fired Gregg Williams after the regular season ended. He has been under suspension by the NFL because of the New Orleans Saints' "bounty" program when he was their defensive coach.
St. Louis coach Jeff Fisher doled out much of the defensive responsibilities in 2012 to linebackers coach Blake Williams, the son of Gregg Williams.