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
Evander Holyfield vs. Lennox Lewis Schulz. Mike Tyson then defeated Frank Bruno to capture the WBC heavyweight title. Tyson then challenged and defeated Seldon to win the WBA heavyweight title (the WBC title was not at stake in that fight), setting the stages for a Tyson–Holyfield match in which Holyfield won the WBA title. Next for Holyfield was a victory against Moorer in a rematch unified the WBA and IBF heavyweight titles. Tyson chose to vacate the WBC heavyweight title rather than face Lewis, preferring to face Holyfield as it was a more lucrative fight. Lewis recaptured the vacant WBC title by defeating McCall and