Joel MejiaJoel Francisco Mejía de la Cruz is a Dominican Republic sprinter. He competed in the 4 × 400 m relay event at the 2012 Summer Olympics.Personal bests400 m: 46.32 s 'A – Irapuato, 7 July 2012800 m: 1:49.67 min' – Mayagüez, 17 July 2011