Age: 38
Title: President, Ultimate Fighting Championship
Pro: White enjoys a cult-like following among the growing legions of UFC fans. He looks like a fighter—and curses like one, too. Handles every aspect of a business conservatively worth around $100 million. It was worth $2 million just six years ago.
Con: Though new rules have reduced the sheer brutality of mixed martial arts, critics still deride the sport as a violent sideshow. Volatile execs with outsize personalities tend to get themselves in trouble at some point.