The main event was expected to feature current UFC Featherweight Champion, Jose Aldo taking on future UFC Lightweight Champion, Anthony Pettis. However, in mid-June Pettis pulled out of the bout citing a knee injury and was replaced by Chan Sung Jung.

Josh Koscheck was expected to face Demian Maia at the event. However, Koscheck was forced out of the bout with an injury and as a result, Maia was pulled from the card as well.

Promotional newcomer Robert Drysdale was expected to face Ednaldo Oliveira at the event. However, Drysdale pulled out of the bout in mid-July citing a lingering staph infection. Oliveira faced UFC newcomer Francimar Barroso at the event.

Phil Harris was expected to face John Lineker at the event. However, Harris was forced out of the bout and Lineker faced promotional newcomer Jose Maria Tome.

Clint Hester was expected to face Cezar Ferreira at the event. However, Hester was forced out of the bout with an injury and was replaced by Thiago Santos.

Brian Stann co-commentated the card with Mike Goldberg due to a prior commitment for Joe Rogan.

John Lineker missed the 126 pound weight allowance for a Flyweight fight, weighing in at 129 pounds. As a result, he surrendered 20 percent of his purse to his opponent, José Maria, and the bout took place as a 129-pound catchweight fight.

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Wikipedia