Leandro Mateus Barbosa (born November 28, 1982 in São Paulo, São Paulo, Brazil) is a Brazilian professional basketball player, who plays at the guard position with the Phoenix Suns in the National Basketball Association. In Brazil also called Leandrinho Barbosa, or just nicknamed "Leandrinho" (Little Leandro), in USA is "The Brazilian Blur", referring to the fact that he is one of the fastest players in the NBA. Barbosa is married to Brazilian actress Samara Felippo, who is pregnant with their first child.

Barbosa started his career at Palmeiras when he was 17. He played on Paulista (São Paulo's) Championship under the command of Lula Ferreira, the future Brazil national team coach.

At 18, he played on the principal team of Palmeiras on Paulista (São Paulo's) Championship. He averaged 14.2 points per game. After that he was traded to Tilibra/Bauru on January 2001.