Johnny Walker stopped Waldo Cortes-Acosta, who is from the Dominican Republic, by TKO at 2:27 of the third round on Saturday, headlining UFC Vegas 124 at the Meta APEX in Las Vegas. The win moved the Brazilian Walker to 24-10 with one no contest, made him 2-0 since moving up to heavyweight, and pushed him into the division’s top 10, where Ciryl Gane and Josh Hokit meet for the title on November 14. Walker’s heavyweight debut had come in October, a first-round knockout of Mick Parkin scored with a flying knee. The UFC billed Saturday’s card officially as UFC Fight Night: Cortes Acosta vs. Walker.
Walker Calls the Finish Improvised, Not Technical
Walker said he won with an improvised style rather than classical technique. He described throwing a punch that does not exist in boxing, one Cortes-Acosta never saw coming, and admitted his original game plan fell apart during the fight. He appeared to ease off right before landing the finishing blow. He said he was deliberately testing how well he could take punches at heavyweight before deciding he had seen enough and finishing the fight.
Walker used to cut close to 40 pounds (18 kg) to make the 205-pound (93 kg) light heavyweight limit. He now walks around at a natural heavyweight weight of 240 to 245 pounds (109 to 111 kg), where he said he has more energy, better recovery in training, more power and a sturdier chin. Walker was an established light heavyweight contender before going through a rough stretch in that division, which pushed him to switch weight classes in 2026. He does not regret his light heavyweight career, but now sees heavyweight as his permanent home. Both of his heavyweight wins, over Parkin and now Cortes-Acosta, have come by stoppage rather than a judges’ decision, the Parkin fight ending in the first round and the Cortes-Acosta fight in the third.
He named Josh Hokit, who challenges Ciryl Gane for the heavyweight title on November 14, as the opponent he would prefer to fight next. In the same interview, he also said he does not want to fight Alexander Volkov, a fellow ranked heavyweight who worked in his corner for the Cortes-Acosta fight.
A Main Event Rebuilt More Than Once
The main event changed shape more than once before fight night. Sean Brady withdrew on October 29, with a staph infection confirmed on November 1. Johnny Walker was then booked against Gabriel Bonfim on November 2, and Waldo Cortes-Acosta ultimately stepped in on November 3, on roughly a week’s notice. Full results from the card are available on our UFC results page.
Brother Valter Predicts a Title in 2027
A day after the win, Valter Walker, Johnny’s older brother and a ranked UFC heavyweight himself, wrote on X: “My brother is going to be champion next year and will defend the title against anyone.” He added: “My brother, the guy who made me a fighter, is awesome.” Valter said he had urged Johnny for a long time to move up to heavyweight.
He also posted a screenshot of a family bet that turned 5,000 dollars into 13,750 dollars, saying his wife’s cousin had put money on his brother.
Valter Walker’s Own Heavyweight Record
Valter Walker, nicknamed “The Foot Hunter,” is a ranked UFC heavyweight in his own right. He carries a 16-1 record and has won five straight fights, all by first-round submission.
A Rift That Began at Karate Combat, but No Fight Between Them
The brothers had grown distant since February 2026, when Valter beat wrestler Zion Clark at Karate Combat 59 and Johnny publicly criticized the fight, calling himself “ashamed.” Johnny has said he wants to be closer to his brother, while blaming Valter’s jokes and behavior for upsetting their mother, his own wife and Valter’s fans.
Asked before UFC Vegas 124 about a possible fight with Valter, Johnny Walker said: “No, man. Am I going to fight my own brother? Are you crazy?” He added: “I go in there to hurt other people. I don’t want to hurt my own blood.” Since beating Cortes-Acosta, he has maintained he will never fight Valter.
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