Watch Big John McCarthy’s Greatest Reffing Mistakes.

John McCarthy has long been considered one of the top referees in Mixed Martial Arts. The former police officer and Gracie Academy Black Belt is a pioneer in the evolution of the sport and has been a referee since the early days of the UFC. When you have reffed thousands of fights over the course of 3 decades, there are going to be moments where even the best will make mistakes. Big John is still batting a stellar .950, but here are the rare moments where he might have missed a called, stepped in too late, or accidentally broke a fighter’s nose.


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