In 1927, Boston Soccer Club of the American Soccer League (ASL) signed Gonsalves. Nineteen years old at the time, Gonsalves joined a team which had taken second in the ASL the previous season and was stocked with talented international players. Finding it difficult to break into the starting lineup, Gonsalves did not play a game with Boston until Christmas Eve. However, given the chance, he grabbed it and scored a goal two minutes later. He went on to find the net six times in his next twenty games. That season the Wonder Workers also took the league title.