-
Home
-
UFC News
-
Sports Doctor Disputes Glover Teixeira’s Take On Raoni Barcelos’ UFC Vegas 121 Collapse
Sports medicine doctor Brian Sutterer, MD, has challenged Glover Teixeira’s description of Raoni Barcelos’ frightening collapse at UFC Vegas 121, warning against framing a loss of consciousness after head trauma as the body protecting an athlete from further punishment.
Barcelos was taken to a Level 1 trauma center after going unconscious in the fifth round of his September 26 main event against Raul Rosas Jr. at the UFC APEX in Las Vegas. Rosas was awarded the stoppage at 1:38 of round five, but the result soon became secondary as medical staff treated Barcelos and he was removed on a stretcher.
Teixeira, who worked Barcelos’ corner, said subsequent testing found swelling in the fighter’s brain and described the incident as a traumatic brain injury. He suggested the swelling may have led Barcelos to black out because his body effectively “shut down” when his determination would not allow him to stop. Sutterer disagreed sharply with that interpretation.
Brian Sutterer MD Pushes Back On Glover Teixeira’s Raoni Barcelos Explanation After UFC Vegas 121 Scare
“Yea that’s not how it works and is the kind of harmful thinking that is bad for combat sport culture,” he wrote. “Your brain doesn’t ‘switch off’ as a defense mechanism when it’s taken trauma. It shuts off and fails because of the structural damage actually injuring the brain and making it not work.” He added that reported brain swelling, if confirmed, should be treated with the seriousness it deserves. “If he truly had swelling in his brain that could have been fatal and should never be misconstrued as some minor ‘scare’ that gets rebranded as toughness,” Sutterer said.
Yea that’s not how it works and is the kind of harmful thinking that is bad for combat sport culture.
Your brain doesn’t “switch off” as a defense mechanism when it’s taken trauma. It shuts off and fails because of the structural damage actually injuring the brain and making it… https://t.co/GEafLF7td0
— Brian Sutterer MD (@BrianSuttererMD) October 2, 2026
The response carries extra weight because Sutterer had cautioned after the fight that a traumatic brain injury or intracranial bleeding had to be considered following a prolonged bout involving repeated head strikes. He made clear at the time that he had not examined Barcelos, did not have access to imaging or records, and was discussing possibilities from public footage rather than offering a diagnosis.
Barcelos and Rosas fought through four competitive rounds, with Barcelos reportedly ahead on all three scorecards entering the final frame. Rosas needed a finish and secured a takedown during the fifth, after which Barcelos went limp. Replays did not provide a conclusive answer as to whether his head or neck struck the fence, whether the fall caused the injury, or whether an issue developed before the takedown.
The immediate UFC update stated that Barcelos was stable, alert and responsive with full movement after a CT scan and comprehensive assessment. He remained under medical supervision after being transported for evaluation. Davi Ramos, Barcelos’ head coach, later said the fighter had regained his senses, could talk and move his limbs. Barcelos’ doctor, Gustavo Medeiros, called it a “sudden illness” and said he was lucid and oriented while remaining in hospital for observation.
Early reports from Barcelos’ team indicated that stroke and heart attack had been ruled out, although his coach also said the cause had not yet been fully explained while further examinations continued. That uncertainty is central to Sutterer’s point.
A collapse after a demanding MMA fight can require doctors to assess multiple possibilities, including traumatic brain injury, internal bleeding, dehydration, electrolyte disruption, heat-related illness, cardiac concerns, or injury from the fall itself. But no public medical record has yet laid out Barcelos’ complete diagnosis, imaging findings, treatment plan, or return-to-fight timetable.