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
Cruiserweight (boxing) 1980 Camel won and became the first cruiserweight champion. In 1982 the World Boxing Association recognized Ossie Ocasio as their first cruiserweight champion when he defeated South African Robbie Williams (although at that time the WBA called the division "junior heavyweight"). The International Boxing Federation followed suit in 1983 when it matched former WBC champion Marvin Camel against Rick Sekorski for their inaugural title. Camel won and became the first IBF cruiserweight champion. Several boxers moved up to Heavyweight after winning world titles at Cruiserweight. Evander Holyfield unified the WBA, WBC, and IBF titles to become undisputed champion, the first