Bill Cowher was 34 years old when he first earned the head coaching job for the Pittsburgh Steelers, among the youngest coaches in the league. He was 49 when he finally retired a decade and a half later, having won a championship and had a great deal more success along the way—enough to earn him a gold jacket that signifies he is a member of the Pro Football Hall of Fame.
It’s no surprise that, given his relatively young age of retirement and the fact that he was a very successful coach, he was regularly approached by teams looking to bring him back in as their head coach.