Where did John McCarthy officiate his first UFC match? 
John McCarthy (referee): 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. UFC 2: The Ultimate Fighting Championship Part II (later renamed UFC 2: No Way Out) was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC) on March 11, 1994, at Mammoth Gardens in Denver, Colorado.
Denver, Colorado