Allen Park — Even though it's his first season as a defensive coordinator, Aaron Glenn comes to the Detroit Lions with all kinds of credibility.
The resume is topped with an exceptional 15-year playing career. A first-round pick in 1994, he would go on to be selected to a trio of Pro Bowls, while racking up 41 interceptions in 205 games.
After retiring in 2008, Glenn tried his hand in personnel, first as a general manager of a small indoor team called the Houston Stallions before a two-year stint as a scout for the New York Jets, the team that drafted him.