A featherweight bout has been added to the UFC's fourth outing on FOX as Michihiro Omigawa is set to face Manny Gamburyan as part of the UFC on FOX 4 fight card. Sources close to the situation confirmed the news with MMA Fighting's Ariel Helwani.

Both fighters appear to be in must-win positions ahead of this pivotal bout.

Gamburyan, 31, has dropped three of his last four at featherweight. He most recently faced Diego Nunes at UFC 141 in December of 2011 where he ultimately lost by unanimous decision. Omigawa, 36, has also lost three of last four in the weight class. In his last bout he was defeated via unanimous decision to Yuri Alcantara at UFC 142 in January of 2012.

UFC on FOX 4 will take place August 4th, 2012 and will be held at the Staples Center in Los Angeles, California. The event will be headlined by a non-title middleweight bout between Brian Stann and former Bellator middleweight champion Hector Lombard.