Seattle Sounders FC is an American professional soccer club based in Seattle, Washington. The Sounders compete as a member of the Western Conference of Major League Soccer. The club was established on November 13, 2007, and began play in 2009 as an MLS expansion team. The Sounders are a phoenix club, and the third Seattle soccer club to carry the Sounders name being part of a legacy which traces back to the original team of the NASL in 1974.
The club's majority owner is Adrian Hanauer, and its minority owners are Joe Roth, Paul Allen and Drew Carey. Former USL Sounders coach and assistant coach Brian Schmetzer took over as head coach in July 2016 after the departure of Sigi Schmid. The Sounders play their home league matches at CenturyLink Field, with a reduced capacity of 41,000 seats for most matches. Along with several organized groups, a 53-member marching band called 'Sound Wave' supports the club at each home match. Seattle competes with rival MLS clubs Portland and Vancouver for the Cascadia Cup.
The Sounders played its inaugural match on March 19, 2009, winning 3–0 over the New York Red Bulls. Seattle has been among the league's most successful teams, winning the U.S.