What happened to Raoni Barcelos at UFC Vegas 121?

Everyone wants to know what happened to Raoni Barcelos.

Unfortunately, there still is no definitive answer.

The 39-year-old Ultimate Fighting Championship (UFC) veteran was involved in a terrifying scene during the fifth round of his UFC Vegas 121 main event against Raul Rosas Jr. last night (Sat., Sept. 26, 2026) inside Meta Apex in Las Vegas, Nevada.