[6] He competed in the 2016 Olympic Games in Rio de Janeiro, reaching the round of 16 in the Men's 100 kg category, where he was defeated by eventual bronze medalist, Japanese Ryunosuke Haga.

[7] At the 2019 World Judo Championships, Buzacarini won two fights and reached the round of 16, where he was eliminated by Elmar Gasimov, Olympic runner-up in 2016.

[14] At the 2021 World Judo Championships, Buzacarini debuted against Estonian judoka Grigori Minaskin and achieved one of the most beautiful ippon of the day at the Laszlo Papp Arena.

The Brazilian aggressively attacked the Dutchman Michael Korrel, bronze in the last World Championships, in Tokyo 2019, but ended up being eliminated in the round of 16.

[17] At the 2023 Judo Grand Slam Tbilisi, he lost in the semifinals to the second-placed in the world rankings, Georgian Ilia Sulamanidze, but later obtained the bronze medal.