When Dan Campbell, another former Saints assistant and the head coach of the Lions, took over in Detroit, he brought Glenn with him to lead the defensive unit. Now, three seasons later, Glenn is adopting a similar staff-building approach to Campbell's.

The Cowboys interviewed Eagles offensive coordinator Kellen Moore, who played for the team and then served as Dak Prescott’s play-caller for four seasons. Dallas also interviewed former Jets coach Robert Saleh and former Vikings coach Leslie Frazier.