05:01 PM ET 01.16 | The Dallas Cowboys are going through some tough times, and with them come coaching changes. Owner Jerry Jones already changed defensive coordinators from Rob Ryan to Monte Kiffin, and now another move may be on the horizon. According to Gregg Rosenthal of NFL.com, the Cowboys tight end coach John Garrett, brother of head coach Jason, is not expected to be retained. Garrett is currently a candidate for the head coaching position at the University of Delaware. Regardless of what happens with Delaware, the Cowboys aren't expected to bring him back as Jason Witten's position coach.