IBF Latino and WBO Light Welterweight Champion won 34 of his first 35 matches after turning professional in 2004.
A two-time Colorado state wrestling champion coming out of high school, he turned to amateur boxing upon graduation.
He had two spectacular matches with Brandon Rios, who likewise won 30 straight matches before their first fight, in late 2012.
His father was also an aspiring boxer, and his cousin Ricky Lopez fought in the Super Bantamweight division.
His 2011 matchup against Breidis Prescott in November 2011 was the undercard of Manny Pacquiao vs. Juan Manuel Marquez III.