sentences:  In his first world championship fight on September 2, 2006, Guerrero defeated Eric Aiken by an eighth-round technical knockout in Los Angeles.Guerrero used inside fighting, neutralizing Aiken's power, and eventually making Aiken quit on his stool after the eighth round to earn his first world title belt.Guerrero lost the belt in his next fight in a mandatory defense to future Featherweight champion Orlando Salido in Las Vegas.