Steven ("Steve") Micael Plasencia (born October 28, 1956 in Minneapolis, Minnesota) is a former American long-distance runner. Plasencia competed in the 10,000 metres at the 1988 Summer Olympics and the 1992 Summer Olympics. In the closest 1-2 finish in the race's history, Plasencia edged out Keith Brantly by one second to win the 1992 California International Marathon (2:14:14). His 14:02.86 5000 metres at the Drake Relays at the age of 40 was the American Masters record until 2014 when it was broken by Bernard Lagat.