Seattle Sounders FC supporters

Seattle Sounders FC, a Major League Soccer club established in 2007, has gained a reputation for having passionate supporters since its inaugural season in 2009.

In the wake of the Haiti disaster, Gorilla FC raised over $20,000 with the help of players Steve Zakuani, Patrick Ianni, and James Riley.

[14] NEF primarily sits in the north end of the stadium beneath the "Hawks Nest" in sections 100 and 144–152.

[17] The band plays music from multiple genres such as Latin, rock and pop,[17] and sits with the supporters in the north end of CenturyLink Field.

These geographic rivalries are expected to continue when the MLS awards teams to both Portland and Vancouver for the 2011 season.

[20] In 2004 the fan-based Cascadia Cup was created to formalize the competition between the Seattle, Portland, and Vancouver USL teams.

[21] The fan-created Heritage Cup competition with the San Jose Earthquakes was begun in the 2009 MLS season.