 At the more competitive 2000 Central American and Caribbean Junior Championships in Athletics he came third with a wind-assisted mark of 7.77 m, finishing behind Leevan Sands of the Bahamas.The 2000 World Junior Championships in Athletics was held in Chile that year and Castillo made his first world-level appearance and placed fourth, just outside the medal positions.Castillo gained eligibility to compete for the Northern Arizona University Lumberjacks