
Del Rosario, of Irvine, Calif., hasn’t come close to losing since turning pro in August 2006. He has yet to go the distance; in fact, only one of his fights has gone past the first round.
Besides power, the 6-foot-4, 27-year-old Del Rosario possesses excellent movement and quickness. A graduate of UC Irvine with a degree in Psychology, Del Rosario played basketball in high school. He also is an active professional Muay Thai fighter.
In his last start, Del Rosario defeated heavy-handed Lolohea Mahe via first round TKO on June 23rd, 2010 in Everett, Washington.