Defender Olubayo Adefemi started his youth career in 2001 with Bendel Insurance and from 2002-04 played with Delta United Asaba. As a promising young player, Adefemi moved to Israel in 2004 and was with Hapoel Jerusalem from 2004-05, Hapoel Tel Aviv from 2005-06, Hakoah Ramat Gan from 2006-07, and Hapoel Bnei lod from 2007-08. In 2008 Adefemi played with Rapid Bukarest in Romania and in 2009 moved to SCR Altach in Austria. After spending one season with US Boulogne in France, Adefemi finished his career in to Greece with Skoda Xanthi in the 2010-11 season. Internationally Adefemi was a member of the Nigerian U20 team that placed second behind Argentina, captained by Lionel Messi, at the 2005 FIFA World Youth Championships. In 2008, Adefemi was a member of the Nigerian Olympic team that was also second behind a Messi-led Argentina. Adefemi played in all five games at the Olympics and scored one goal, in a semifinal match against Morocco. Adefemi was also capped two times with the Nigerian Senior national team from 2009-11. On 18 April 2011 Olubayo died in a car accident while driving on Egnatia Odos, near the city of Kavala, Greece. He was on his way to Nigeria in order to finalize details of his wedding.
Nigeria