(– 48 kilograms). In 1991 he represented the island in two major international events. The first one was the World Amateur Boxing Championships, organized in Sydney, Australia from November 15 to 23. In this event he won bronze, finishing in the third global position along Daniel Petrov of Bulgaria. His second international participation of the year was in the Pan American Games that took place on Havana, Cuba. Here he again took bronze, sharing the third position with Fernando Retayud of Colombia. A year later he went on to represent Puerto Rico at the 1992 Olympic Games, held in Barcelona, Spain. These would mark his final participation in an amateur event. Dieppa only participated in one fight in the first round of the Olympic boxing tournament, where he fought against Daniel Petrov. Dieppa lost the fight by points, with a final score of 7-10.