Diaz, originally of Costa Rica, worked his way through the amateur motocross system in the U.S.. He raced the annual Air Nautiques/AMA Amateur National Championship at Loretta Lynn Ranch starting in 2005 and then worked his way through the Intermediate and Expert ranks. This year, Diaz turned pro and qualified for Michigan’s Red Bud National in July.
MX Sports Pro Racing offers their condolences to Oscar’s friends and family. He will be missed on and off the track.