DALLAS – If Jerry Jones listens to Mavericks coach Rick Carlisle long enough, he might end up offering Jason Garrett a lifetime contract extension. Carlisle has become a Cowboys fan and friend of Garrett’s in recent years, somewhat regularly visiting Valley Ranch during the Mavs’ offseason. As a head coach who has dealt with his share of adversity, Carlisle also has tremendous admiration for how Garrett has handled the various difficult circumstances encountered by the Cowboys this season.