Ricardo Izecson dos Santos Leite (Portuguese pronunciation: [ʁiˈkaɾdu iˈzɛksõw duˈsɐ̃tus ˈlejtʃi]; born 22 April 1982), commonly known as Kaká (/kæˈkæ/ or /kæˈkɑː/), is a Brazilian football attacking midfielder who currently plays for Spanish La Liga club Real Madrid and the Brazilian national team. Kaká started his footballing career at the age of eight, when he began playing for a local club. At the time, he also played tennis, and it was not until he moved on to São Paulo FC and signed his first professional contract with the club at the age of fifteen that he chose to focus on football.
Football sports all involve, to varying degrees, kicking a ball with the foot to score a goal. The most popular of these sports worldwide is association football, more commonly known as just "football" or "soccer". Unqualified, the word football applies to whichever form of football is the most popular in the regional context in which the word appears, including American football, Australian rules football, Canadian football, Gaelic football, rugby league, rugby union and other related games. These variations of football are known as football "codes".
Various forms of 'football' can be identified in history, often as popular peasant games. Contemporary codes of football can be traced back to the codification of these games at English public schools in the eighteenth and nineteenth century. The influence and power of the British Empire allowed these rules of football to spread, including to areas of British influence outside of the directly controlled Empire, though by the end of the nineteenth century, distinct regional codes were already developing: Gealic Football, for example, deliberately incorporated the rules of local traditional football games in order to maintain their heritage. In 1888, The Football League was founded in England, becoming the first of many professional football competitions. In the twentieth century, the various codes of football have become amongst the most popular team sports in the world.