Castillo had defended his Lightweight title three times before , but never against a fighter like the talented Mayweather .
The crowd cheered loudly for the Mexican champion , chanting his name as he stalked Mayweather around the ring .
Castillo had defended Mayweather 's Lightweight title three times before , but never against a fighter like the Mayweather Mayweather .
The crowd cheered loudly for the Mexican champion , chanting his name as he stalked Mayweather around the ring .