The bout was added to the top of the card at Seattle's KeyArena on July 27, FOXSports.com learned Wednesday night.
A second fight on the card was also scheduled as the losers from the first two UFC women's bantamweight bouts, Liz Carmouche and Miesha Tate, will fight on the main card.
Tate, who lost a third-round stoppage to Cat Zingano at The Ultimate Fighter Finale, is currently under suspension from the Nevada State Athletic Commission. Injuries sustained in the Zingano fight will require Tate to obtain ENT clearance on her nose or not fight until October 11. NSAC has also mandated no contact for Tate until May 29.
The Johnson-Moraga fight was originally scheduled for The Ultimate Fighter Finale on April 13 before Johnson was forced to withdraw with due to a shoulder injury.
FOXSports.com has also learned that Matt Mitrione’s indefinite suspension will end at UFC on FOX 8.
The UFC heavyweight --- who was fined and banned for comments he made about transgendered fighter Fallon Fox earlier this month ---- will face fellow Ultimate Fighter 10 competitor Brendan Schaub.
Mitrione called Fox, who underwent a gender reassignment surgery in 2006, “a lying, sick, sociopathic, disgusting freak” in an interview. The unprovoked statements came on April 8, two days after Mitrione halted a two-fight skid with a victory over Phil De Fries at UFC on FUEL TV 9.
UFC president Dana White told reporters before UFC on FOX 7 last week that Mitrione was apologetic and accepted responsibility for his statements.
Other bouts previously announced to take place in Seattle include: