1. Brian Viloria vs Eric Ortiz
On September 10, 2005, Viloria dropped down to light flyweight and won the WBC title by knocking out Eric Ortiz in the first round with a powerful right.
2. Brian Viloria vs Ulises SolÃs
On April 19, 2009, Viloria moved back down to junior flyweight to challenge Mexican Ulises “Archie” SolÃs 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 in the 11th round with a vicious right to the jaw. The official bout stoppage was a KO 2:56 into the 11th round. 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.
3. Brian Viloria vs Giovani Segura
On December 10, 2011. Brian Viloria knocked down Giovani Segura in 8th Round TKO.
4. Brian Viloria vs Omar NiÃ±o Romero III
After his fight against Segura, he fought Omar NiÃ±o Romero on May 13, 2012 in Ynares Sports Arena, Pasig City, Philippines. In the 9th round, he caught Romero with face and body powerful punches forcing referee Michael Ortega to stop the fight. He retains again his WBO Flyweight title.
5. Brian Viloria vs Hernan Marquez
Viloria challenged Hernan Marquez on November 17, 2012 in a flyweight unification match, staking his WBO title and the latter’s WBA crown. He went on to stop his opponent in 10 rounds, thus becoming the first flyweight unified world champion since 1965.