Oliver McCall Oliver McCall Oliver McCall (born April 21, 1965) is an American former professional boxer who competed from 1985 to 2014. He is best known for winning the WBC heavyweight title in 1994 by scoring an upset knockout victory over Lennox Lewis. The next year he defended the title against Larry Holmes before losing it to Frank Bruno. McCall would also become known for an in-ring mental breakdown during his 1997 rematch with Lewis. Known as "The Atomic Bull", McCall turned pro in 1985 and slowly worked his way up the heavyweight ranks. He beat Jesse Ferguson and future heavyweight champion
Frank Warren (promoter) Chisora, Nicky Piper and Amir Khan. Warren guided Hamed to become Britain's youngest ever world champion when he beat Steve Robinson to win the WBO Featherweight title at the Cardiff Arms Park, Wales, in 1995; he oversaw the ascent of Ricky Hatton to the IBF Light Welterweight Championship of the World after beating Kostya Tszyu in 2005; and has been with former IBF and WBO/WBC/WBA/Ring Magazine Super Middleweight Champion Joe Calzaghe throughout the majority of his 46 fight unbeaten career. Warren signed the 2004 Olympic Lightweight silver medallist Amir Khan and guided him to be a world champion in 2009,