Kammala wannan jumla: Ya kafa mafi kyawun mutum na 8057 a cikin garin Havana a watan Maris na 2008, ya karya shingen 8000 a karon farko. Farkon bayyanar Díaz a fagen duniya ya zo ba da daɗewa ba a Wasannin Olympics na bazara na 2008, amma bai yi gasa a cikin takaddun sa na musamman ba amma a matsayin wani ɓangare na ƙungiyar relay na mita 4 × 400 na Cuba tare da Yunier Pérez, William Collazo da Omar Cisneros. Tawagar ta kasa ci gaba bayan matakin zazzabi na gasar. Ya lashe lambar yabo ta farko a shekara mai zuwa a Havana a
2009 Gasar Tsakiyar Amurka da Caribbean a Gasar Wasanni, wanda ya zama na biyu a bayan dan uwansa Leonel Suárez amma ya sami damar zira kwallaye sama da 8000 a karo na biyu a cikin aikinsa tare da jimlar karshe na 8013.