Wagner Santos Lago (born 1 January 1978), known as Wagner, is a Brazilian football manager and former player who is the current manager of the Široki Brijeg U19 team. He played 13 years for Bosnian Premier League club Široki Brijeg, where he was also the club captain and won one league title and three cups. Wagner would later go on to manage the under-19 team of Široki Brijeg.