Rising from Puerto Rico's top Olympic finish in Athens, Diaz put her retirement plans on hold, as she finished behind South Korea's Shin Kyung-hyeon in the heavyweight division at the 2005 World Taekwondo Championships in Madrid, Spain, and then crushed Mexico's Sulayyil Madrigal to earn her last of four golds at the 2006 Central American and Caribbean Games in Cartagena, Colombia.