He started playing professionally for Monterrey, in the Mexican league, he also played for Pachuca, San Luis, Toluca, Tampico Madero, Atlético Español and Unión de Curtidores, where he was called to be part of the Mexico national football team.

He was the 3rd best Mexican coach in the history of the Mexico national under-20 football team, with excellent numbers achieved a 5th place in the 1993 FIFA World Youth Championship.

With a percentage of victories of the 60%, and players such as Oswaldo Sánchez, Duilio Davino and Rafael García Torres, who participated in his under-20 football team, he formed, later, part of the Mexico national team that has played in the 2006 FIFA World Cup in Germany.

Castillo also coached the Santos Laguna team in Torreón, leading them to the 3rd place of the Group 4 in the 1999 tournament.

[4] After only 5 months in charge, he won the Copa Centroamericana in Panama against Costa Rica (2–1), after 16 years that Honduras could not win this regional cup.