A big flyweight division bout has been added to UFC On Fox IX as John Moraga competes against Darren Uyenoyama. Moraga will be competing for the first time since losing a UFC Flyweight Title bout to Demetrious Johnson at UFC On Fox VIII. Uyenoyama has won two of three under the UFC banner, which includes a victory over Norifumi Yamamoto at UFC On Fox I. UFC On Fox IX takes place on December 14th from the Sleep Train Arena in Sacramento, California with Anthony Pettis and Josh Thomson headlining.