Orthodox heavyweight known for his shocking, improbable knockout upset of the seemingly invincible Mike Tyson in 1990 to become the undisputed heavyweight champion of the world.
He played football and basketball at Linden McKinley High School in Ohio.
He guest-refereed a WWF match between Hulk Hogan and Randy 'Macho Man' Savage in 1990.
His father William Douglas was also a professional boxer.
After the Tyson upset, he lost the title eight months later to Evander Holyfield.