The 2019 Seattle Sounders FC season was the club's eleventh season in Major League Soccer, the United States' top-tier of professional soccer. The 2019 season was Brian Schmetzer's third full MLS season as head coach of the Sounders. Seattle-based Zulily became the official jersey sponsor of the Sounders in the 2019 season.
Sounders FC won their second MLS Cup title at the end of the season, playing in front of a franchise-record 69,274 fans at CenturyLink Field.
In January 2019, the Sounders announced that their USL-affiliated team, Seattle Sounders FC 2, that had moved to Tacoma, Washington would be re-branded as the Tacoma Defiance. In addition, the club announced that Zulily would replace Xbox as the jersey sponsor after signing a multi-year deal.
Long-time midfielder Osvaldo Alonso, who had served as captain and been with the club since its inaugural MLS season, was released into free agency and signed with Minnesota United FC in January 2019. Defender Chad Marshall, who had joined in 2014, announced his retirement from professional soccer on May 22, leaving mid-way through the season.
On August 2, defender Román Torres was suspended for ten matches after testing positive for a performance-enhancing substance by the league.
The Sounders clinched a spot in the 2020 CONCACAF Champions League by virtue of having the 4th best record in the regular season and making it to the Western Conference Finals in the Playoffs; the three other teams in the Conference Finals had also clinched berths in the Champions League or were ineligible (in the case of Toronto FC).
Numbers after plus-sign(+) denote appearances as a substitute.
[TAC] â Defiance player