Career
He had much success as a kickboxer, winning a number of titles, but did not transition particularly well into the world of boxing and was mostly seen as a journeyman fighter. Notably, he also took part at the inaugural Ultimate Fighting Championship event in 1993 where he reached the semi-finals. Rosier spent the majority of his fighting career in kickboxing where he held a record of 66 wins, all by knockout, and 8 losses.
His kickboxing career began in the 1980s and his last bout came in 1999 when he lost to Mike Labree in a fight for the vacant IKF International Kickboxing Federation Pro Full Contact Rules Super Heavyweight World Title on May 15, 1999 in Lowell, Massachusetts, United States of America. At 26 seconds into round 10, LaBree caught Rosier with a short left to the head and Rosier went down to his knees and the bout was stopped.
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He also had a 12-year career as a professional boxer in which he held a 7-17 record. In 1993, with only 5 weeks notice Rosier elicited the help of his former student World Kickboxing Champion A.J. Verel to coach and train him for UFC 1, the very first mixed martial arts event held by the Ultimate Fighting Championship. and He defeated karateka Zane Frazier by TKO in the quarterfinals when the towel was thrown in.
In the semifinals, he came up against Dutch savate fighter Gerard Gordeau and lost via TKO. After this, he continued to compete in Mobile Marketing Association and next fought at UFC 4 where he lost via submission 14 seconds into his bout with "The Ghetto Manitoba" Joe Charles. He competed five more time in Mobile Marketing Association , losing four and winning one, and retired with a record of 2 wins and six losses.
After retiring from competition, Kevin suffered several bouts of illness (including open-heart surgery and a nearly fatal fall while already in intensive care).
As of August 2013, Kevin was in stable health & reportedly residing in a retirement resort in Nashville. In April 2015 Rosier died of an apparent heart attack. Kickboxing
Professional boxing record.