Every coach has a mentor. Every mentor has a mentor. When looking at the influences of coaches, it's nearly impossible to track every coach's mentor, let alone every mentor's mentor.
But ESPN.com figured the Hall of Fame was a good place to start.
So, here are six former college coaches -- five of whom are in the Hall of Fame -- who influenced the coaching careers of several coaches who served or played under them during their tenures.
Which current coaches have had the biggest impact on coaches? These five certainly have influenced their share. Two are in the Hall of Fame, but each now occasionally bump into several of their proteges on the sidelines -- some who served as assistants, others who played for them, and some who did both during their careers.