A huge flyweight division bout is the latest addition to UFC On Fox 13 as John Moraga battles Jussier Formiga. Moraga has won two of three since losing his UFC Flyweight Title shot to Demetrious Johnson at UFC On Fox VIII. Formiga has won three of his last four under the UFC banner, most notably defeating Chris Cariaso at UFC On FX VIII. UFC On Fox 13 takes place on December 13th from the US Airways Arena in Phoenix, Arizona with Junior Dos Santos and Stipe Miocic headlining.