5. The 2014 Supporters Shield
After finishing with the second best record in MLS back in 2011, it was finally time to go one better – a combined 45 goals and assists from Dempsey and Martins helping the Cascadian side to an MLS-best 64 points from their 34 games, with a record of 20-10-4.
The side's defensive record was barely mid-table, but those contributions from Dempsey and Martins, as well as clutch inputs from some of the supporting cast, gave the Sounders the second best attacking record in the league, which they rode to the 2014 Supporters Shield.
To this day, it's the only time they've left the MLS regular season as the best team. However...
6. The 2016 MLS Cup
That's right, Seattle's eighth consecutive playoff appearance finally yielded their first appearance in the MLS Cup final, and first win at the peak of North American men's domestic soccer.
On paper, the Sounders had no right to turn 2016 into their crowning moment. Manager Sigi Schmid left the club after 20 games of the season with the team second to last in the Western Conference, with just 14 games left. Then to make matters worse, they lost Clint Dempsey for the rest of the campaign with a heart condition.
No matter. Under the guidance of Brian Schmetzer, they won eight of their last 14 to grab the 4 seed in the West before knocking off Sporting KC, 1-seed Dallas and 2-seed Colorado to meet Toronto FC in the final.
The game was far from a classic, going to penalties after 120 minutes of scoreless football, but a sudden death miss from Toronto's Justin Morrow allowed Seattle defender Roman Torres to fire home and spark wild celebrations.