Charles Edward "Charlie" Greene was an American track and field sprinter and winner of the gold medal in the 4 × 100 metres relay at the 1968 Summer Olympics. Charles Greene (United States) set the men's 100 m world record of 10.0 in Sacramento, USA on June 20, 1968. It stood 0 days, until Jim Hines's 9.9 on June 20, 1968. Wiki link