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 Bruno it appeared the protesting Bugner could have continued. In February 1989, Bruno challenged Mike Tyson for the undisputed world heavyweight title. In the opening moments, the fighters came together with huge punches. Bruno's legs buckled, and he took a big step back, inadvertently stepping off the ring apron. Most agree that he would have gone down, at least to a knee in any event, and this was called a knockdown. Bruno did not complain, and instead gathered himself to continue, ultimately rocking Tyson (for the first time in Tyson's career) with a left hook toward the end of the round.