Frank Mir discusses nearly killing Jason ‘Mayhem’ Miller during training

Frank Mir | Photo by Ethan Miller/Getty Images Frank Mir is not a guy to mess around with.
Mir is one of the most decorated heavyweights to ever compete inside the octagon. A former UFC heavyweight champion, Mir is considered to be among the greatest heavyweight grapplers in UFC history and holds a number of promotional records along those lines, including most submission wins in UFC heavyweight history (8), fastest submission in UFC heavyweight history (45 seconds), and the only toehold submiss