Sounders FC Supporter Groups The Sounders FC boasts one of the most passionate and diverse selection of supporters in Major League Soccer and is proud to recognize the following four official supporter groups - Emerald City Supporters, Gorilla FC, North End Faithful and Eastside Supporters. Emerald City Supporters Who Are The Emerald City Supporters? Emerald City Supporters (ECS) are a group of independent supporters of Seattle Sounders FC. Our aim is to support our team and to create a good atmosphere in the stadium. The vision is that the ECS becomes an umbrella organization that incorporates supporter subgroups of all persuasions. If you are thinking of starting a group or need help please contact us via email (ecs@weareecs.com). Or you can just stand with the ECS without starting a subgroup.