Dan O'Brien

Daniel Dion "Dan" O'Brien (born July 18, 1966) is an American decathlete of Portland, Oregon and Olympic and World champion in decathlon.

After the previous successes of Daley Thompson and Torsten Voss, O'Brien became the first multiple world champion in Decathlon at Stuttgart 1993, and achieved a hat-trick at Gothenburg 1995. He was the Men's heptathlon world record holder from 1993 to 2010, when it was broken by compatriot Ashton Eaton.