Charles L. "Sonny" Liston, nicknamed "the Big Bear", was an American professional boxer who competed from 1953 until his death in 1970. A dominant contender of his era, he became the undisputed world heavyweight champion in 1962 after knocking out Floyd Patterson in the first round, repeating the knockout the following year in defense of the title; in the latter fight he also became the inaugural WBC heavyweight champion. Often regarded as one of the greatest boxers of all time, Liston is known for his immense strength, formidable jab, long reach, toughness, and is widely regarded as one of the most intimidating men in boxing history. World heavyweight champion (NYSAC and WBA) from September 25, 1962 to July 22, 1963. Wiki link