Gil Castillo, a seasoned mixed martial artist, competed with a record of 8 wins, 5 losses, and no draws. He specialized in the welterweight division, weighing in at 170 lbs. Standing at 5' 9", Castillo adopted a southpaw stance during his matches. In terms of performance, Castillo demonstrated an average of 0.6 significant strikes per minute and a striking accuracy of 45%. He absorbed an average of 2.22 strikes per minute, with a strike defense rate of 44%. Additionally, he averaged 3.33 takedowns every 15 minutes, achieving a takedown accuracy of 45%. Notably, he did not attempt any submissions during his UFC career. Castillo's most significant victory came against Chris Brennan, who held an ELO rating of 1006. His last fight was on November 22, 2002. Prior to that, he faced Dave Menne in September 2001, resulting in a loss via unanimous decision. However, Castillo managed to secure a win against Brennan in January 2002, marking one of his few victories in the UFC.