He played in the 1994 and 1998 FIBA World Basketball Championship. He was also a member of the gold winning Puerto Rican National Basketball Team at the 1994 Goodwill Games held in Saint Petersburg, Russia. Vega won the bronze medal at the 1999 Pan American Games while also playing in the 1993 and 1998 Central American and Caribbean Games, the 1995(where the team won the gold medal) and 1999 FIBA Americas Championship, and in the 1995 and 1999 Pan American Games. Vega has played professionally in the Continental Basketball Association (CBA), Turkey, Venezuela, Cyprus and in Spain's Liga ACB, where he joined Caja Cantabria during the 1998 season, averaging 18.4 ppg.