O’Halloran (aka Non the mute bad guy from Superman II) was born in Philadelphia, Pennsylvania. Fighting as “Irish” Jack O’Halloran out of Boston, Massachusetts, he was a heavyweight boxing contender active from 1966 to 1974. The 6-foot, 6-inch O’Halloran was undefeated throughout his first 16 professional fights.
During his career, O’Halloran defeated former title contenders Cleveland Williams and Manuel Ramos. He also defeated Danny McAlinden who won the bronze medal for boxing at the 1966 British Empire and Commonwealth Games in Kingston, Jamaica and later became the British and Commonwealth Heavyweight Champion. O’Halloran’s losses included defeats to future heavyweight champions George Foreman and Ken Norton.
In 1973, O’Halloran was close to attaining a match against Muhammad Ali when he was knocked out by Jimmy Summerville. This ended his chances to fight Ali. Although O’Halloran went on to defeat Summerville by K.O. in a rematch, with only three more wins and five losses he was never again a serious heavyweight contender.
The California Boxing Hall of Fame has listed O’Halloran as one of its inductees of the 2009 HOF class.