Cejas joined the Racing Club youth team in 1959 at the age of 13. He made his first team debut in 1962 at the age of 17. In 1966, he helped Racing Club to win the Argentine Primera. The following year Racing won the Copa Libertadores 1967 to become Libertadores champions of South America for the only time in the club's history. They followed this up by beating Celtic F.C. in the Copa Intercontinental to become the first Argentine club champions of the world.
In 1977, Cejas returned to Racing Club where he played until 1980. By the end of his second period with the club he had set a club record of 313 appearances. He then had a short spell with River Plate where he was part of the squad that won the Nacional in 1981.
1Placar started to give this prize to the best grade holder at Bola de Prata since 1973. In its 2013 ceremonies, a Bola de Ouro was given to Dirceu Lopes, holder of the best 1971 grade. Francisco Reyes and Elías Figueroa, holders of 1970 and 1972 ones respectively, have not been announced as these years' winners yet.