Seattle Sounders FC is an American professional soccer club based in Seattle, Washington. The club competes in Major League Soccer (MLS), playing home matches at CenturyLink Field with a reduced capacity. It was established in November 2007 as an MLS expansion team; the first match of the club's inaugural season was played on March 19, 2009. It is the third team to bear the Sounders name, and the 15th team to join the league. In each of its first five seasons, the club set an MLS record for average attendance. It competes with its local rivals, Portland and Vancouver, for the Cascadia Cup. Brian Schmetzer has been the team's head coach since 2016, replacing Sigi Schmid. Seattle has been among the league's most successful teams, winning the U.S. Open Cup four times, the Supporters' Shield in 2014, and the MLS Cup in 2016. The team has qualified for the MLS Cup Playoffs in each of its ten seasons and competed in the CONCACAF Champions League five times, advancing as far as the semifinals. (Full article...)