Furlong was a member of the Argentine team that won the gold medal at the 1950 FIBA World Championship, being the second top-scorer, a member of the All-Tournament Team, and the MVP of the tournament. He also scored 20 points in the final against the United States. In the 1951 Pan American Games, he helped Argentina win the silver medal in basketball. At the 1952 Helsinki Summer Olympics, his team earned a fourth-place finish in the basketball tournament, after losing in the semifinals, against the United States, 85–76.