Instead, Grosics began his professional football career in Dorog, playing for Dorogi Bányász in 1943.

With the rather short[7] Grosics in the goal, the team started an unbeaten streak in 1948 that would last until the 1954 FIFA World Cup.

The charges were eventually dropped due to lack of evidence, but Grosics was banned from the national team for two years.

Hungary entered the 1954 FIFA World Cup on a four-year unbeaten streak and as heavy favorites.

During the 1956 Hungarian Revolution, Grosics and his family fled the country and attempted to start a new life.

[3][8] When he was banned from transferring to Ferencvárosi TC after the 1962 season by the Communist Hungarian Sports Ministry, he retired.

[8] Grosics is credited with developing the "sweeper-keeper" style of play, whereby the goalkeeper can act as an extra defender when needed.

[3] This also allowed his teammates to press deep in their opponents' half, plus Grosics' willingness to come out and challenge opposing attackers caused them to miss shots on net.