Marcus O’Sullivan, Irish middle distance runner, is born in Cork, County Cork, on December 22, 1961. Although he does not plan to enroll at any of Ireland’s universities, his running encourages him to go to Villanova University. After four years of education at Villanova, he graduates with a degree in accounting and later attains an MBA and a CPA.
O’Sullivan quickly becomes a world class runner and takes part in four summer Olympic Games. He wins three gold medals at the IAAF World Indoor Championships over 1500m in Indianapolis (1987), Budapest (1989), and Toronto (1993). In his victories in 1987 and 1989, he sets championship records. He is third all-time in total sub-4 minute miles with 101, trailing Steve Scott (137) and John Walker (127).
At the 1985 European Athletics Indoor Championships, O’Sullivan wins a silver medal in the 1500m. He finishes 4th in the 1991 IAAF World Indoor Championships in Seville, Spain. He qualifies for Ireland for Olympic Games in 1984, 1988, 1992, and 1996, at both 800 metres and 1500 metres. He reaches the 1500 metre finals at the 1988 Summer Olympics in Seoul, South Korea.
O’Sullivan sets an indoor 1500 metres world record of 3:35.4 on February 10, 1989, and is generally regarded as a better competitor running indoors. This is evidenced by the fact that he wins the prestigious Wanamaker Mile in Madison Square Garden‘s Millrose Games six times (1986, 1988, 1989, 1990, 1992, and 1996).
O’Sullivan’s personal best for the mile, which is set indoors in 1988, is 3:50.94. His personal best for the 1500 metres, which is set outdoors in 1996, is 3:33.61.
O’Sullivan, along with Irish runners Ray Flynn, Eamonn Coghlan, and Frank O’Mara (who ran collegiately at the University of Arkansas) establish the still standing world record in the 4 x 1 mile relay, when they combine in Dublin on August 17, 1985 to run 15:49.08.
O’Sullivan now runs the Running Works cross country summer camp in Canadensis, Pennsylvania, along with Cricket Batz, and is the head coach of Villanova cross country and track and field. He is coached by Tom Donnelly of Haverford College and advises Bob Kennedy in the later years before Kennedy’s retirement.
In addition to his ties to American record holder Bob Kennedy, O’Sullivan has coached elite professional runners such as Canadian indoor world silver medalist Carmen Douma-Hussar and New Zealander Adrian Blincoe.