Dana White lauded Juan Diaz for an ‘absolutely incredible’ knockout in the final week of his Contender Series on Tuesday night.The UFC CEO offers up-and-coming fighters the opportunity to earn a contract in his promotion through Dana White’s Contender Series (DWCS), and Diaz certainly made the most of his.Diaz cracked Wonil with a thunderous elbow that sent shivers down the spine of the MMA worldGettyThe South Korean was knocked out instantlyGettyAs Diaz wheeled away in celebration before he was awarded with a UFC contractGettyIt was the final set of fights of DWCS season nine this week as Diaz met Kwon Wonil in the co-main event slot at UFC Apex in Las Vegas.The 27-year-old from Peru had Wonil wounded in the opening exchanges in a first round he clearly won on the judges’ scorecards.Then, in the final seconds of round two, Diaz drew his opponent towards the cage before timing a perfectly placed spinning back elbow that knocked his South Korean opponent out instantly.The small crowd inside the Apex erupted before the camera panned to White, who could be heard saying, ‘That was insane.’ Replays showed the spectacular KO turned Wonil’s lights out without warning, while the sound from cageside footage – like a slap against concrete – echoed around the arena.After one of the greatest fights in DWCS history last week, White witnessed arguably the greatest KO in the series this week and knew he had just one thing to do.Dana White awards Juan Diaz UFC contract after spectacular KO“Where’s Juan Diaz at?” he said, speaking to UFC commentator Laura Sanko after the fight.“Juan – ha. Absolutely incredible. Listen to me. If you’re not number one tonight on ESPN’s top plays of the day, ESPN is full of s***.“Juan Diaz – welcome to the UFC!”Fans agreed with White in their reactions to the insane KO.MMA fans react to Diaz’s KOWhite called Diaz’s KO ‘incredible’ and welcomed the Peruvian to his promotion after the fightGettyOne said on X: “Absolutely gorgeous,” while another compared it to a ‘human helicopter blade.’A third added: “If Dana White is impressed, nothing more needs to be said.”And a fourth responded: “That did not sound good.”Middleweight Wes Schultz, welterweight Michael Oliveira, featherweight Marwan Rahiki, and light heavyweight Levi Rodrigues Jr also received UFC contracts for their respective performances in the finale of DWCS on Tuesday night.This brought the total number of contracts awarded across the 10 weeks to 46, which is the joint-most for a single season.Diaz’s finish not the only spinning elbow KO of 2025Diaz’s KO continues a trend of devastating spinning back elbow finishes in MMA this year.Several MMA stars, like Lerone Murphy at UFC 319, have finished fights with a spinning back elbow this yearGETTYDiego Lopes left Jean Silva looking like this after he stopped him with a spinning back elbowGettyOutside of the UFC, Alina Dalaslan finished Clara Ricignuolo at Oktagon 76 with something similar back in September at Oktagon 76, while Alfie Davis stopped Clay Collard in the same fashion five months prior under the PFL banner.Sergio Pettis kept the trend going when he disposed of Magomed Magomedov on the undercard of Paul Hughes vs Usman Nurmagomedov 2 this month.In the UFC, Christian Leroy Duncan cracked Eryk Anders with a spinning back elbow on his way to finishing the American in their April bout.Diego Lopes produced another one in a blood-soaked main event at Noche UFC, one month after Lerone Murphy and Carlos Prates had scored back-to-back spinning elbow knockouts on the main card of UFC 319.