Molina had 12 caps for Argentina, from 1985 to 1991, without ever scoring. He won three times the South American Rugby Championship in 1985, 1987 and 1989. He was called for the 1987 Rugby World Cup, playing in all the three games but without scoring. He was called once again for the 1991 Rugby World Cup, playing in one game, without scoring, as Argentina would be eliminated in the 1st round.