Diego Corrales vs. José Luis Castillo was a boxing match in Las Vegas, Nevada, USA, on May 7, 2005. The fight was a 12-round lightweight unification bout between Corrales and Castillo. Corrales, who had a career record of 39–2 with 32 knockouts, was the World Boxing Organization (WBO) champion. Castillo, at 52–6–1 with 46 knockouts, was the World Boxing Council (WBC) champion. Castillo's style was to fight inside. Corrales' trainer, Joe Goossen, told Corrales to fight inside, as well.