Brian Costello of the New York Post tweets that he just “heard” that the Dallas Cowboys have fired defensive coordinator Rob Ryan. Not sure if this is out there but I just heard the Cowboys have fired Rob Ryan. — Brian Costello (@BrianCoz) January 9, 2013 Dallas wouldn’t go as far to say that he would be brought back next season, so there was a chance that he could be replaced. The Cowboys ranked 24th in points allowed last season, which is pretty surprising when you consider the kind of talent they have on defensive side of the ball. The post Cowboys Fire DC Rob Ryan? appeared first on NFL Trade Rumors -.