List of Seattle Sounders FC seasons

[2][3] In addition to league play, the Sounders compete in the annual U.S. Open Cup tournament organized by the United States Soccer Federation and the Leagues Cup contested by teams from MLS and Liga MX of Mexico.

[7][8] The Sounders are one of the most successful clubs in MLS history,[9][10] having won eight trophies since entering the league in 2009.

[13][14] The club earned their first Supporters' Shield in 2014, completing a double,[15] and won the MLS Cup in 2016 and 2019 during a run of four finals in five years.

[11][17] The Leagues Cup remains the only major North American competition that the Sounders have not won; the team finished as runners-up in the 2021 edition.

[28] The most-attended home Sounders matches were the 2022 CONCACAF Champions League Final's second leg with 68,741—a tournament record—and MLS Cup 2019 with 69,274 spectators.