Short answers, pulled from the story.
Seattle Sounders FC won the expansion bid on the 13th of November 2007, but played their first home match on the 19th of March 2009. The club returned to top-level soccer in the region after the original NASL team dissolved in 1983.
Paul Allen originally partnered with the city to build Lumen Field, which has an artificially reduced capacity of approximately 37,722 seats for most regular matches. The venue holds up to 69,000 seats for special events like international friendlies or playoff finals.
The club won its first MLS Cup on the 10th of December 2016 by defeating Toronto FC 5, 4 in a penalty shootout. They claimed their second MLS Cup in 2019 by beating Toronto FC 3, 1 at Lumen Field.
On the 2nd of September 2009, the Sounders claimed the U.S. Open Cup by defeating D.C. United 2, 1 at RFK Stadium. This victory made them only the second expansion team in league history to win a major trophy in their debut season.
The Sounders established their academy system in 2010 under managers Dick McCormick and Darren Sawatzky. The program fields teams across four age levels within the U.S. Soccer Development Academy framework.