Big John McCarthy

John McCarthy
McCarthy refereeing during MMA Attack 2 in Katowice, Poland
Born	John Michael McCarthy (1962-10-12) October 12, 1962 (age 54)
Nationality	American
Other names	"Big John McCarthy"
Occupation	MMA referee, podcast host

John Michael McCarthy (born October 12, 1962) is an American mixed martial arts referee, perhaps best known for his officiating of numerous bouts promoted by the Ultimate Fighting Championship (UFC) dating back to UFC 2. Known to fans as "Big" John McCarthy, he took a brief sabbatical from officiating toward the end of 2007 to pursue a career in television commentary for The Fight Network and also provided commentary for Affliction, before returning to his role as a referee in 2008. McCarthy is also a former Los Angeles Police Officer, and a Tactical Self-Defense Instructor at the Los Angeles Police Academy, as well as the founder of C.O.M.M.A.N.D: a training and certification school for MMA referees and judges. He has also officiated bouts in Bellator, and is a qualified boxing referee. In February 2015, Big John & Bellator commentator Sean Wheelock launched their new weekly podcast, Let's Get It On with Big John McCarthy & Sean Wheelock.

In 1985, McCarthy became a police officer for the Los Angeles Police Department (LAPD) following his father Ronald, who worked as a police officer for thirty years. (John's son, Ronald II, is also a police officer.) In August 1993, McCarthy was awarded his Tactics & Self-Defense Instructor Certification by the LAPD, and taught for the department until his retirement in 2007.

The nickname of 'Big John' came about because of his size and stature. He stands 6'4" and weighs 260 lb; making him larger than the majority of the athletes over whom he presides. According to a UFC interview, the nickname was given to him by UFC co-founder and promoter Art Davie. McCarthy recalls that the nickname began when he forcibly lifted Davie off the ground and held him in the air.

McCarthy was the most senior referee in the UFC and is well known for his delivery of "Let's Get It On!", a catchphrase created by boxing referee Mills Lane. McCarthy served as one of the head referees for nearly every fight in the UFC from UFC 2 until UFC 77, and was considered as much a part of the UFC as the octagonal arena itself as he was the key figure in the writing of the current Unified Rules for the sport of MMA, which is now recognized by the ABC and Athletic Commissions across North America. His 535th bout was the main event at The Ultimate Fighter: Team Hughes vs. Team Serra finale in Las Vegas, Roger Huerta vs. Clay Guida. McCarthy briefly retired after this bout to pursue a career as a commentator for The Fight Network but returned to officiating just a year later. Since his return, McCarthy has refereed for promotions all over the globe including the UFC, K-1 (Japan), Strikeforce, Affliction, Bellator, King of the Cage and a multitude of others.