A Banned Move in a Sanctioned Event: What Willian Masuda's Injury Reveals About BJJ's Enforcement Gap
Willian Masuda, a 37-year-old BJJ instructor known to the community as "Kabuto," was attempting to develop a stronger foundation in what he thought would be a new phase of his grappling career. On August 22, 2026, at Super Pro Jiu-Jitsu 2026 in Londrina, Paraná, that plan ended in a moment.
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