Overview

• The bout at Philadelphia’s 2300 Arena on Sept. 20 ended two minutes in when Mazza’s forearm popped as she attacked from back control.
• Referee Vitor “Shaolin” Ribeiro briefly reset the position before stopping the match once the fracture became apparent.
• Both athletes initially believed the loud crack came from Hansen’s jaw before realizing the injury was to Mazza.
• Footage from the broadcast and social media shows Mazza remaining composed on the mat, and she later thanked supporters in a hospital post.
• Reports describe the self-inflicted break as a highly unusual grappling outcome, and no detailed medical prognosis or recovery timeline has been disclosed.