Ken Norton, Sr. (August 9, 1943 – September 18, 2013) was an American professional boxer. Norton was vacated the WBC heavyweight championship in 1978 for his impressive victory over Jimmy Young, the original title holder was Leon Spinks who was stripped of the title for refusing a mandatory defense against Norton. His greatest ring victory was his split decision win over Muhammad Ali in March 1973, which is sometimes dubbed “The Jawbreaker” after Norton broke Ali’s jaw during the fight. Despite losing by knockout to heavy hitters such as George Foreman in 1974 and Earnie Shavers in 1979, Norton did defeat many top contenders during his career such as Jerry Quarry, Ron Stander, Duane Bobick, Jimmy Young and Randall Cobb. His final professional contest was in May 1981, at the age of 38. Norton was well past his prime and was knocked out in the first round against Gerry Cooney. He died in September 2013 after a long battle with stroke complications, Norton was 70 years old.