Nieves competed in the 2013 San Silvestre Candelaria 4,500 meter race. In May 2013, he competed at the Kern Sauleda Pharme-Grand Prix to try to get to be allowed to race at the IPC Athletics World Championships in Lyon, France in the 5,000 meter race. Later that month, he tried to be eligible for the World Championships in the 10,000 meter race at a race in Huesca. Nieves has a goal of trying to compete in the 2016 Summer Paralympics.