The main event was a UFC Flyweight Championship bout between champion Demetrious Johnson and top contender John Moraga.

[7] However, on May 14, 2013, it was announced Madadi pulled out of the bout citing alleged visa issues and was replaced by Jorge Masvidal.

[8] Miesha Tate was pulled from her scheduled bout with Liz Carmouche to participate as coach on The Ultimate Fighter 18[9] and was replaced by Jéssica Andrade.

[19] ^ John Albert and Tim Means were reportedly fined 20 percent of their purse for failing to make the required weight for their fights.

The Washington State Department of Licensing's initial report did not include information on the penalty.