Zane Troy Frazier (born July 16, 1966) is an American former karateka, kickboxer and mixed martial arts who competed in the heavyweight division. 

Frazier attained the rank of fourth degree black belt in American Kempo Karate and was the winner of the California, United States and North American karate championships in 1984 before becoming the international karate champion in 1987 and again in 1990. After making the transition to kickboxing, he won the World Kickboxing Federation (WKF) United States super heavyweight title in 1993.

On November 12, 1993, Frazier competed at UFC 1, a no-holds-barred fighting tournament and the very first mixed martial arts event held by the Ultimate Fighting Championship. He reportedly earned his place in the tournament by beating up Frank Dux in a street fight which was witnessed by UFC founders Rorion Gracie and Art Davie. Gracie and Davie had come to Los Angeles to scout the U.S. karate championships for potential fighters but saw Frazier and Dux's brawl beforehand. Frazier claims that he had been teaching classes for Dux and that Dux hadn't paid him; Dux disputes that account and says that Frazier sucker punched him while wearing brass knuckles In the UFC 1 tournament quarter-finals, he faced fellow kickboxer Kevin Rosier in what turned out to be a sloppy brawl. The match ended with Rosier clubbing Frazier to the floor with a series of blows to the back of the head, then stomping on him before Frazier's corner threw in the towel. Frazier suffered respiratory failure and was rushed to hospital after the fight.

He returned to kickboxing the following year to win the WKF North American Super Heavyweight Championship but took his second MMA bout in September 1995 when he fought at Shooto in Tokyo, knocking out Kendo Nagasaki thirty-six seconds into the fight. Having amassed a 17-0 kickboxing record in the United States, Frazier made his K-1 debut in Nagoya, Japan on December 9, 1995 against Takeru and suffered his first defeat at the hands of the karate stylist as he succumbed to a barrage of knees and punches in round two.

Frazier then made his way back to the UFC in May 1996 at UFC 9 and was defeated via TKO by Cal Worsham three minutes into the fight. In his second and last outing in K-1, he went up against Nobuaki Kakuda at K-1 in Osaka, Japan on September 1, 1996. Despite having a massive size advantage, Frazier was knocked down with a low kick in round four and lost by decision.

Following this, Frazier continued his career in MMA and in his next fight against Sidney "Mestre Hulk" Gonçalves Freitas in Brazil, he was knocked out after falling from the ring and hitting his head on the floor. After this, he continued to fight throughout the 1990s and 2000s and recorded mostly losses. His final fight came in January 2008 and he was knocked out by Richard Blake.

Below is a list of Fraziers Championships and awards:

• USA Heavyweight Karate Championship (1984)
• North Western Karate Championship (1984)
• North American Heavyweight Karate Championship (1984)
• International Karate Championship (1987)
• International Karate Championship (1990)
• California Karate Championship (1991)
• California Karate Championship (1992)
• WFC Heavyweight Championship
• WKF United States Super Heavyweight Championship
• WKF North American Super Heavyweight Championship