Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alberto Javier Ortega Rosa (born 11 July 1978 in Montevideo) is a Uruguayan football midfielder. He currently plays for Curicó Unido in Chile. A midfielder (or simply mid) is an association football position. Some midfielders play a more defensive role, while others blur the boundaries between midfielders and forwards. The number of midfielders a team uses during a match may vary, depending on the team's formation and each individual player's role. The group of midfielders in a team is called the midfield.