Kaká began his career with grassroots club São Paulo FC at the age of eight. He signed a contract at 15 and led the São Paulo youth squad to Copa de Juvenil glory. Kaká made his senior side debut in January 2001 and scored 12 goals in 27 appearances, in addition to leading São Paulo to its first and only Torneio Rio-São Paulo championship where he scored two goals in two minutes in his first team debut as a substitute against Botafogo in the final, which São Paulo won 2–1. He scored 10 goals in 22 matches the following season and by this time his performance was soon attracting attention from European clubs. Kaká made a total of 58 appearances for São Paulo, scoring 23 times.

Source: WikiPedia