 Born in Lima, Del Solar developed at the youth system of Universitario de Deportes, but played his first professional match with Asociación Deportiva San Agustín after he was loaned by Universitario to continue his development as a player.He won his first Peruvian Primera División championship with San Agustín, defeating Alianza Lima in December 1986.Del Solar's last official appearance was a 0–0 draw against traditional rivals Alianza Lima for the "Apertura" on 7 July 2002, playing for his first club which won 1–0 in the first game, with 0–0 in Trujillo.