Ten of the event’s 24 fighters were drug tested, including UFC flyweight champion Demetrious Johnson and challenger John Moraga. All 10 fighters returned negative results for performance enhancing and recreational drugs.
The UFC on Fox 8 fighters tested were Demetrious Johnson, John Moraga, Rory MacDonald, Jessica Andrade, Mac Danzig, Daron Cruickshank, Ed Herman, Germaine de Randamie, Aaron Riley, and Yaotzin Meza.
Johnson submitted Moraga via armbar in the main event, defending his belt for the second time.
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