No. 13: Mike Singletary
Photograph By Jonathan Daniel/Getty Images
A two-time defensive player of the year (1985, '88) Singletary's intensity and focus was one of the defining characteristics of the "Shufflin' Crew" Super Bowl champs. The middle linebacker was a seven-time first-team All-Pro and 10-time Pro Bowler. He was a second-round pick by the Bears in 1981 and played until '92. Singletary was inducted into the Hall of Fame in 1998.