 On December 11, 2010, Mijares became a two-time world champion by beating IBF Super Flyweight Champion Juan Alberto Rosas.In May 2011, Cristian made his first defence, a victory over contender Carlos Rueda.On June 16, 2018, Mijares headlined his retirement card before a partisan crowd at Gómez Palacio, losing by third round knockout to Wilfredo Vázquez Jr. of Puerto Rico.