| February 8, 2013 |  On trial (out)
Board and staff
Season overviewPreseasonOn 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.
Match resultsPreseasonDesert Diamond CupTable standingsGroup stageFinal
2012–13 editionChampionship roundQuarterfinalsSemifinals
MLS regular seasonStandingsWestern ConferenceOverall tableNote: 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
U.S. Open CupHeritage CupThe competition began in 2009 when the expansion Seattle Sounders FC began play, becoming the second MLS team named after their NASL counterpart — the San Jose Earthquakes having been the first.
Squad statisticsTop scorersIncludes all competitive matches. The list is sorted by shirt number when total goals are equal.
Top assistsIncludes all competitive matches. The list is sorted by shirt number when total assists are equal.
Clean sheetsIncludes all competitive matches. The list is sorted by shirt number when total clean sheets are equal.
Disciplinary recordIncludes all competitive matches. The list is sorted by shirt number when total cards are equal.
CaptainsIncludes all competitive matches. The list is sorted by shirt number when games are equal.
Starting XIIncludes all competitive matches.
Italic: denotes no longer with club.
AwardsMLS All-Stars| Position | Player | Link | | DF | Webarchive|url=https://web.archive.org/web/20141221013130/http://www.mlssoccer.com/all-star/2013/news/article/2013/07/15/all-star-tim-cahill-robbie-keane-deandre-yedlin-added-mls-gameday-roster-lan |date=December 21, 2014
Sounders FC MVP| Position | Player | Link | | MF | 
Sounders FC Defender of the Year| Position | Player | Link | | DF | 
Sounders FC Golden Boot| Position | Player | Link | | FW |
| Week | Player | Opponent | Link | | 12 |
AT&T Goal of the Week| Week | Player | Opponent | Link | | 21 |
MLS Save of the Week| Week | Player | Opponent | Link | | 24 |
MLS Team of the Week| Week | Player | Opponent | Link | | 1 |
| Player | Link |
MLS WORKS Humanitarian of the Month| Month | Player | Link | | August |
ReservesMLS Reserves LeagueLeague table;West Division
MiscellanyAllocation rankingSeattle is in the No. 3 position in the MLS Allocation Ranking. It swapped its natural position, No. 15, with Chivas USA in the Shalrie Joseph trade. The allocation ranking is the mechanism used to determine which MLS club has first priority to acquire a U.S. National Team player who signs with MLS after playing abroad, or a former MLS player who returns to the league after having gone to a club abroad for a transfer fee. A ranking can be traded, provided that part of the compensation received in return is another club's ranking.
International roster slotsSeattle has eight MLS International Roster Slots for use in the 2013 season. Each club in Major League Soccer is allocated eight international roster spots and Seattle traded an international spot to Montreal Impact in return for Lamar Neagle.
| Player | Nationality | | Osvaldo Alonso |
Kits| Type | Shirt | Shorts | Socks | First appearance / Info | | Home | Rave Green | Blue | Rave Green | | | Home Alt. | Rave Green | Rave Green | Blue | MLS, March 23 against San Jose | | Home Alt. | Rave Green | Rave Green | Rave Green | MLS, May 4 against Philadelphia | | Away | Shale | Shale | Shale | | | Third | Cyan | Cyan | Cyan | |
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