2002 12 07 Location: Mandalay Bay Resort & Casino, Las Vegas, Nevada, USA Referee: Joe Cortez Judge: Ken Morita Judge: Larry O'Connell Judge: Daniel Van de Wiele World Boxing Council Lightweight Title (1st defense of Mayweather) The Ring Magazine Lightweight Title (Mayweather defending) Weights: Castillo 135 lbs, Mayweather 134 lbs