Peggy O'Neill of the United States is the oldest living Olympian. She has been continuously participating in the Olympics since she first started boxing at the age of 18 in 1932. She won her first two bouts by knockout and went on to become one of the best boxers in the world during her career. O'Neill retired after competing in her sixth Olympics in 1952. She has never lost an Olympic fight and has a record of five wins and two draws. She is the only boxer in Olympic history to win five fights by knockout.