Currently it's Vlad an Vitali Klitschko and David haye.
probably bob fitzsimmons who only weighted 167 pounds when he took the title from James j corbett.
fitz was at the time reigning middleweight champion.
The U.F.C Light Heavyweight Champion is Currently Lyoto"The Dragon" Machida.
Michael Spinks in 1985 when he beat Larry Holmes.
Bob Fitzsimmons won the heavyweight title first, then the light heavyweight championship.
Boom Boom Mancini
roy Jones jr beating john ruiz
He never held the Light Heavyweight Title. He was a 3 time Heavyweight champion. He won his first title against Sonny Liston.
Michael spinks was the first reigning light heavyweight champion to move up and claim the world heavyweight title. bob fitzsimmons won the heavyweight title before winning the lt heavy crown.
WWE Champion; World Tag Team Champion; Intercontinental Champion; Hardcore Champion; European Champion; Light Heavyweight Champion; WCW Tag Team Champion; World Heavyweight Champion
The current WBA Light Heavyweight Champion is Beibut Shumenov. He won the title from Gabriel Campillo on January 29,2010 with a highly controversial split decision victory.
NFWA heavyweight championship, NCW light-heavyweight title, omega new frontier title , NEW junior-heavyweight title, NDW light-heavyweight title, NWA 2000 tag-team champion, UWA middleweight title, omega tag-team title, WWF world tag-team title, WWF intercontinental heavyweight title, WWF world light-heavyweight title, WWF hardcore title, WCW world tag-team title, WWE European heavyweight title. If you want to look for yourself go to www.accelerator3359.com/Wrestling/bios/jhardy.HTML
He has being WBC Heavyweight Champion. I don't know if that is the british heavyweight title.
Brock Lesnar won the heavyweight title match at the UFC 116 event. Shane Carwin was the interim heavyweight champion and Lesnar was the reigning heavyweight champion. So, this bout was the title unification fight. Lesnar defeated Carwin to become the undisputed champion.
As of 25/07/2010 the UFC Heavyweight champion is Brock Lesnar and is set to defend is title against Cain Velasquez at UFC 121 EDIT: facebook(dot)com/thession12 - February 28th 2015 Cain Velasquez is the current Heavyweight champion in the UFC.
NFWA heavyweight championship, NCW light-heavyweight title, omega new frontier title , NEW junior-heavyweight title, NDW light-heavyweight title, NWA 2000 tag-team champion, UWA middleweight title, omega tag-team title, WWF world tag-team title, WWF intercontinental heavyweight title, WWF world light-heavyweight title, WWF hardcore title, WCW world tag-team title, WWE European heavyweight title. If you want to look for yourself go to www.accelerator3359.com/Wrestling/bios/jhardy.HTML
World Heavyweight Champion
He defeated Alberto Del Rio to win the World Heavyweight champion.(The title Edge retired)
He is a 1 Time World Heavyweight Champion