Masten Gregory (February 29, 1932 − November 8, 1985) was an American racing driver. He raced in Formula One between and , participating in 43 World Championship races, and numerous non-Championship races. He was also a successful sports car racer, winning (with Jochen Rindt) the 1965 24 Hours of Le Mans. Career Known as the "Kansas City Flash", Masten Gregory was born in Kansas City, Missouri as the youngest of three children; his elder brother was Riddelle L. Gregory Jr., also a race car driver, and his elder sister Nancy Lee Gregory married, as her second husband, the Anglo-American fashion designer Charles James. An heir to an insurance company fortune, Gregory was well known for his youngish looks and thick eyeglasses, due to his "terrible" eyesight. Although he attended the Pembroke-Country Day School in Kansas City, he left school before completing his senior year, and married Luella Simpson at the age of 19. His parents divorced when he was very young, and his father died when he was three years old. As an adult, Gregory used his inheritance to buy a Mercury-powered Allard, which he drove in his first race, the SCCA race in Caddo Mills, Texas in November 1952. He retired from that race due to head gasket failure, but installed a new Chrysler hemi-powered engine in his car to race at Sebring in 1953, where he again retired, this time due to a rear suspension failure. Gregory's first win came in just his third race, in Stillwater, Oklahoma. Changing to a Jaguar, Gregory won several races in America, including the Guardsmans Trophy in Golden Gate Park, San Francisco and a race at Offutt Air Force Base in Omaha, Nebraska. At the end of 1953, Gregory was invited to his first international sports car race - the 1954 1000 km Buenos Aires in Argentina, which he finished in 14th due to water pump problems. Coming to Europe Throughout 1954 and 1955, Gregory competed in European races, usually driving Ferraris. His record includes the Tourist Trophy at Dundrod and the 24 Hours of Le Mans (although his co-driver Mike Sparken retired before Gregory got a chance to drive). He also won the inaugural Nassau Trophy at the Bahamas Speed Week in 1954. Moving back to America in 1956, Gregory entered several SCCA races, often winning. In 1957, he had another attempt at the Argentine 1000 km race, this time winning.