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.

Aaron Glenn began his NFL career with the New York Jets, and now he's returning home, on Wednesday agreeing to become the team's newest head coach following a four-year run as the Detroit Lions defensive coordinator.

The Jets have hired former Lions defensive coordinator Aaron Glenn as their next head coach, the team announced Wednesday night.