The 2013 Seattle Sounders FC season was the club's fifth season in Major League Soccer, the United States' top-tier of professional soccer. For the Sounders FC organization, it was their fifth year of existence, and including all previous clubs, it was the 33rd season of soccer in Seattle.
Major League Soccer team are limited to seven players without U.S. citizenship, a permanent resident (green card holder), or the holder of other special status (e.g., refugee or asylum status).
Seattle finished its 2012 season by releasing Mike Seamon and Andrew Weber on December 4. Three days later, the club traded Jeff Parke to the Philadelphia Union in exchange for the fifth pick in the 2013 MLS Supplemental Draft.
On October 11, during the tail end of the 2012 regular season campaign, it was announced that Seattle Sounders FC would be participating in the 2013 Desert Diamond Cup with the dates of the matches announced.
Note: the table below has no impact on playoff qualification and is used solely for determining host of the MLS Cup, certain CCL spots, and 2014 MLS draft. The conference tables are the sole determinant for teams qualifying to the playoffs
The competition began in 2009 when the expansion Seattle Sounders FC began play, becoming the second MLS team named after their NASL counterpart â the San Jose Earthquakes having been the first.
|- |colspan=14|Players who left the club during the season: (Statistics shown are the appearances made and goals scored while at Seattle Sounders)
Includes all competitive matches. The list is sorted by shirt number when total goals are equal.