Detroit Lions defensive coordinator Aaron Glenn is unquestionably in high demand for the available head coaching positions throughout the NFL. Glenn spent time during the bye week interviewing for several of those positions.

What do the NFL's five vacancies at head coach have to offer Lions OC Ben Johnson and DC Aaron Glenn? Here's a breakdown of each opening.

Offensive coordinator Ben Johnson could have left Detroit after last season’s success but chose to stay to build on what’s been an impressive campaign under Dan Campbell. This season, he’s once again at the top of the list for several NFL teams looking for a fresh start.