 A 12-round decision win over Artis Pendergrass two months later put the WBC Fecarbox title belt around his waist, and after four more victories during 1997 and 1998, Castillo appeared to be unstoppable.On May 30, 1998, Castillo was matched up with highly regarded and unbeaten heavyweight contender Chris Byrd.In a highly anticipated clash between two of the sport's rising young stars, Byrd outpointed Castillo over ten rounds in Atlantic City.