 Six months later, Castillo was back in the ring and back on another winning streak, taking care of seven straight opponents over the next two years.On October 21, 2000, Castillo earned his first title belt as a heavyweight, over hard-hitting 300-pound Paea Wolfgramm during 12 tough rounds, to win the IBO Intercontinental crown.Castillo was considered the underdog when he took on 32-0 Andre Purlette on January 4, 2002.