Undefeated WBO featherweight champion Rafael Espinoza (25-0, 21 KOs) made it look easy in a voluntary defense of his title by obliterating Sergio Chirino (22-2, 13 KOs) by a fourth-round knockout on Friday night at the BleauLive Theater at Fontainebleau Las Vegas.
The tall, stork-like Espinoza…
