Rex Ryan and the Buffalo Bills have hired Rob Ryan as assistant head coach for defense.

Rob Ryan was fired by the New Orleans Saints as defensive coordinator during the season.

"I'm excited to have Rob join our staff, and I think he will be a great asset for our defense," Rex Ryan said in a statement. "He has a tremendous working knowledge of our schemes, and I look forward to his input."

The Ryan brothers haven't worked together since 1995 with the Cardinals for their father Buddy Ryan.