Joe Bugner British and British Commonwealth heavyweight titles and was a three-time European heavyweight champion. He was ranked among the world's top ten heavyweights in the 1970s, fighting such opponents as Muhammad Ali, Joe Frazier, Ron Lyle, Jimmy Ellis, Manuel Ramos, Chuck Wepner, Earnie Shavers, Henry Cooper, Brian London, Mac Foster, Rudie Lubbers, Eduardo Corletti, Jurgen Blin and George Johnson. He fought for the world heavyweight championship in 1975, losing on points in a second bout with Ali. Bugner retired from boxing in 1976, but over the next two decades he made sporadic comebacks with varying success. He moved to Australia in
Light heavyweight heavyweight division and became undisputed champion of the latter two. Dariusz Michalczewski holds the record for most consecutive title defenses at this division, with 23 defenses of the WBO title. Current champions Below is a list of longest reigning light heavyweight champions in boxing measured by the individual's longest reign. Career total time as champion (for multiple time champions) does not apply. In MMA, the light heavyweight division is from 186 lbs (84 kg) to 205 lb (93 kg). Light heavyweight Light heavyweight, or junior cruiserweight, is a weight class in combat sports. In amateur boxing, light heavyweight is a