Óscar Álvarez Sanjuán (born 9 June 1977) is a Spanish retired footballer who played as a central defender, currently assistant manager of Girona FC B.
[1] After playing for UE Lleida and CD Tenerife in the Segunda División, Álvarez joined Gimnàstic de Tarragona of the same league in July 2005.
Deemed surplus to requirements by Nàstic in the summer of 2006,[3] and subsequently being left out of the first-team squad, Álvarez signed with Orihuela CF from Segunda División B in mid-January 2007.
[7] Álvarez signed for UE Llagostera also in his native region midway through the 2010–11 season,[8] winning promotion from the Tercera División and going on to play several years with the club in the third tier.
Their father Quique Costas occupied the same position, and played professionally for RC Celta de Vigo, Barcelona and the Spanish national team.