UFC on Fox: Johnson vs. Moraga is an upcoming mixed martial arts event to be held on July 27, 2013 at the Key Arena in Seattle, Washington. The event will be broadcast live on Fox Sports. Following Saturday's event, the UFC will take a break until July 27. When the promotion returns it will be at Seattle's Key Arena for UFC on Fox 8, a card that will be headlined by a flyweight title bout between champion Demetrious Johnson and challenger John Moraga.