Marcus Vinícius Oliveira de Almeida , also known as Buchecha (born January 8, 1990) is a Brazilian professional mixed martial artist and 4th-degree black belt Brazilian jiu-jitsu (BJJ) practitioner. A professional mixed martial artist since 2020, he currently competes in the Heavyweight division of the Ultimate Fighting Championship (UFC). He formerly competed in the heavyweight division of ONE Championship . A multiple-time World jiu-jitsu and ADCC submission fighting champion, Buchecha is a member of the IBJJF Hall of Fame and widely considered as one of the greatest Brazilian jiu-jitsu competitors of all time. Cite error: There are tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page ).