 It was only in Raymundo's junior year in Jose Rizal Institute (High school) that he started playing basketball.He was discovered by Eugenio "Boy" Romerica Abunda, Jr., a former Colegio de San Juan de Letran player and coach.Raymundo played for Letran in the NCAA from 1997–1999 and made significant impact for the Knights alongside future PBA players Chris Calaguio and Willie Miller.