Rafael Espinoza, the undefeated WBO featherweight champion, showcased his dominance in a voluntary defense of his title against Sergio Chirino. The fight took place at the BleauLive Theater at Fontainebleau Las Vegas, where Espinoza made it look easy by obliterating Chirino with a fourth-round knockout. The tall and stork-like Espinoza caught an overly aggressive Chirino