Heavyweight boxer Ken Norton Sr. passes away at 70 - The heavyweight who defeated Muhammad Ali began boxing at Camp Pendleton

SAN DIEGO - Heavyweight boxer Ken Norton Sr., who stunned the sports world 40 years ago by defeating Muhammad Ali at the San Diego Sports Arena, died today at the age of 70.

Norton, who broke Ali's jaw and won a split decision in the San Diego fight, was defeated by Ali in rematches at the Forum in Inglewood later in 1973 and Yankee Stadium in 1976.

Family and friends said Norton, who died in a hospice facility in Las Vegas, had been in poor health for several years following a series of strokes, according to reports.

Norton began boxing at Camp Pendleton in northern San Diego County and turne...