High Quality Content by WIKIPEDIA articles! The 1955 U.S. Open was the 55th U.S. Open. The golf tournament was held June 16–19, 1955, at Olympic Club in San Francisco, California. In arguably the greatest upset in golf history, Jack Fleck, a municipal-course pro from Iowa, denied Ben Hogan his record fifth U.S. Open title by prevailing in an 18-hole playoff.