Marcus "Buchecha" Almeida is a Brazilian jiu-jitsu black belt under Rodrigo Cavaca and a member of the Checkmat academy, widely regarded as the most decorated BJJ competitor of all time. He holds the all-time record with 13 IBJJF World Championship titles — including six absolute gold medals — and is a two-time ADCC champion (2013, 2017). Buchecha also claimed four No-Gi World titles and six UAEJJF World Pro gold medals, earning induction into the IBJJF Hall of Fame and a Guinness World Record for most World Championship titles. After dominating competitive grappling for over a decade, he transitioned to professional MMA with ONE Championship before joining the UFC heavyweight division.