63 years (August 4, 1958). Mary Decker and Usia Mary Teresa Slaney (born August 4, 1958, née Tabb, nee Decker) is a retired American middle-distance runner. During her career, she won gold medals in the 1500m and 3000m at the 1983 World Championships and held world records in the mile, 5000m, and 10,000m. After retiring from competition, she became a national champion in the masters division of the marathon. She holds the women's record for the New York City Marathon with 2:44:57. Decker was born on August 4, 1958, in Philadelphia, Pennsylvania. Her parents were George Decker, an insurance executive, and Ethel (née Tabb) Decker, a homemaker. She has two siblings: a brother, David, and a sister, Theresa. After graduating from high school, she attended Stanford University, where she ran for the Stanford Cardinal track team. In 1981, she set a new American record in 3:58.00 minutes for the 800 meters. The following year, she dominated women's indoor track and field by winning all but one race that season. At the 1983 World Championships in Helsinki, Finland, Decker won the gold medal in the 3000 m race with a time of 8:52.64 minutes. She also took home a silver medal in the 1500 m event. At the 1984 Summer Olympics in Los Angeles, California, she finished fourth in the 1500 m final with a personal best time of 4:10.80 minutes.