Geoff Vanderstock

Geoffrey Peter Vanderstock (born October 8, 1946) is an American track and field athlete primarily known for running hurdles. He was once the world record holder in the 400 metres hurdles. His 48.94 was set at the high altitude United States Olympic Trials at Echo Summit, California, on September 11, 1968. He was the first man to run the event under 49 seconds. The hand time took .3 off the previous record held by Rex Cawley.