Juan Miguel Álvarez Zerbino (born Montevideo, 8 July 1980) is an Uruguayan rugby union player.
He plays as a lock.
Álvarez plays for Carrasco Polo Club in Uruguay.
He had 23 caps for Uruguay, since his first game at the 62-8 win over Paraguay, at 6 October 2001, in Montevideo, for the South American Rugby Championship.
His last game was at the 29-26 loss to Russia, at 21 June 2009, in Bucharest, for the IRB Nations Cup.
He scored 2 tries during his international career, 10 points on aggregate.
He was called for the 2003 Rugby World Cup, playing in two games, one of them as a substitute, but without scoring.