Jair da Rosa Pinto, or simply Jair, was an association footballer who played offensive midfielder – one of the leading Brazilian men's footballers of the 1940s and 1950s, who is best remembered for his performance in Brazil's 1950 FIFA World Cup campaign. Usually playing as an inside-forward, Jair da Rosa was noted for his free-role style of play and was most known for his pace and technical ability.

The 1950 FIFA World Cup was the fourth edition of the FIFA World Cup, the quadrennial international football championship for senior men's national teams. it was held in Brazil from 24 June to 16 July 1950. It was the first World Cup tournament in over twelve years, as the 1942 and 1946 World Cups were cancelled due to World War II. Italy, the two-time defending champions, were eliminated in the first round for the first time in history. Uruguay, who had won the inaugural competition in 1930, defeated the host nation, Brazil, in the deciding match of the four-team group of the final round. This was the only tournament not decided by a one-match final. It was also the inaugural tournament where the trophy was referred to as the Jules Rimet Cup, to mark the 25th anniversary of Jules Rimet's presidency of FIFA.