Answer
George Foreman was the opponent Tommy Morrison defeated to claim the WBO heavyweight championship. Morrison, a rising star in the boxing world, faced the legendary Foreman in a highly anticipated bout in 1993. Despite Foreman's experience and power, Morrison showcased his exceptional speed and agility, outmaneuvering and outpunching his opponent. The victory marked a significant milestone in Morrison's career, establishing him as a formidable force in the heavyweight division.