PROFESSIONAL HISTORY

Professional
On September 10, 2005, he dropped down to light flyweight and won the WBC title by knocking out Eric Ortiz in the first round with a powerful right.
He defended it once successfully in 2006 and was undefeated in 20 bouts (1 was a no-contest). Viloria's unbeaten streak ended when Mexican Omar Niño Romero won by decision.
In a rematch held on November 18, 2006 at Las Vegas, Nevada, Romero held onto his title with a controversial majority draw decision, with Viloria knocking down Niño twice. Following the fight, Niño was stripped of his title when he failed a post fight drug test being tested positive for methamphetamines and the second match between them was declared a no-contest.
On April 14, 2007, he fought Edgar Sosa for the vacant WBC title but lost a decision. Viloria then decided to move up to the super flyweight division and began training under former champion, Roberto Garcia, at La Colonia Gym in Oxnard, California.[1]
Brian Viloria (20-2) won a unanimous decision against Jose Garcia Bernal (26-11-1) in his debut at the super flyweight division at the Alameda Swap Meet in Los Angeles, California on January 5, 2008. Viloria knocked Bernal down in the 8th (final) round. All 3 judges scored 78-72 for Viloria.[2] Viloria followed that win by scoring four more victories (Cesar Lopez by Unanimous Decision, Fred Heberto Valdez by a 3rd round KO, Juan Javier Lagos by Unanimous Decision, and Benjamin Garcia by 2nd round KO).
On April 19, 2009, Viloria moved back down to junior flyweight to challenge Mexican Ulises "Archie" Solis for the IBF Junior Flyweight title, putting in what perhaps is the best performance of his career. Pressured by a fading career due to his past losses in big fights, Viloria defeated Solis, whom at the time of the fight was rated the #1 Jr. Flyweight by the Ring Magazine[3] in the 11th round with a vicious right to the jaw. The official bout stoppage was a KO 2:56 into the 11th round. [4] The fight was held at Araneta Coliseum in the Philippines, site of Thrilla in Manila, as the co-main event of the Donaire-Martinez fight. Along with the win, Viloria snapped Solis' 11-fight unbeaten streak, 8 of which were title defenses while extending his win streak to 6.