Demetrious Johnson out of fight

An undisclosed injury has forced UFC flyweight champion Demetrious Johnson out of a scheduled title defense against John Moraga on April 13.

UFC officials confirmed the news on Tuesday. The 125-pound title fight was scheduled to headline The Ultimate Fighter Finale in Las Vegas. A new main event has not yet been announced.

Johnson (17-2-1) successfully defended the flyweight title for the first time with a unanimous decision over John Dodson in January. He claimed the inaugural belt with a split decision win over Joseph Benavidez at UFC 152.

Moraga (13-1) earned the title bid with back-to-back finishes over Ulysses Gomez and Chris Cariaso. The Arizona native's only loss came in 2010 to Dodson via decision.