The St. Louis Rams announced on its team website Tuesday that former Dallas Cowboys defensive coordinator Rob Ryan would not be hired as the Rams' defensive coordinator.The team cited a difference in philosophy."After extensive conversations regarding defensive philosophy, the Rams and Rob Ryan agreed he was not the right fit for the club's defensive coordinator position," COO/executive VP of football operations Kevin Demoff told the team website. "The Rams will continue the interview process with the club's other candidates."Ryan was the Cowboys' coordinator the past two seasons but was fired on Jan. 8. Cowboys owner Jerry Jones cited the defense's performance in losses to Seattle and Chicago this season, before injuries took a heavy toll on starters, as a reason for Ryan's dismissal.Cowboys coach Jason Garrett has pointed to the defense's lack of turnovers under Ryan.Ryan coached a 3-4 defensive alignment with the Cowboys, with some use of the 4-3. Rams head coach Jeff Fisher uses a 4-3 defense.