Thiago Alves d'Araujo is a Brazilian mixed martial artist currently competing as a Welterweight in the Ultimate Fighting Championship. He started training in Muay Thai when he was 15 and mixed martial arts and Brazilian jiujitsu at 17. He is a brown belt in Brazilian Jiu-Jitsu.
- Born: October 3, 1983 (age 34), Fortaleza
- Aliases: Thiago "Pitbull" Alves
- Height: 5′ 9″ (1.75m)