The UFC has officially beefed up its UFC 331 line-up, announcing three new contests for the event scheduled for 19 September at Crypto.com Arena in Los Angeles. Among the additions is the second UFC appearance of heavyweight prospect Gable Steveson, who continues his transition from Olympic wrestling champion to mixed martial arts contender. Another major addition sees Australian heavyweight Tai Tuivasa return to the Octagon against Robelis Despaigne. Article continues after this ad AdvertisementThe third newly confirmed fight is a middleweight contest between Ryan Gandra and Ozzy Diaz. With Steveson’s development under heavy scrutiny and Tuivasa fighting to keep his UFC hopes alive, the newly announced bouts provide several compelling storylines heading into September