The FIFA Club World Cup is on tour. Next stop: Seattle. Founded in 2007, Seattle Sounders FC is one of the most successful and popular clubs in Major League Soccer (MLS), the top football league in the United States of America. Based in Seattle, Washington state, the Sounders are known for their vibrant fans, who regularly sell out Lumen Field. The North American club has won several titles, including the MLS Cup and the CONCACAF Champions League, and has become one of the continent's leading footballing organisations. With modern management and a strong connection to the local community, the Seattle Sounders have made a significant contribution to the growth of football in the United States of America.