06-Dec-2017 16:54:00 | Yahoo Sports
To get a sense for the significance of the Seattle Sounders' first MLS Cup championship, consider the collective mental state of their opponent ahead of this weekend's rematch. Prior to last December, the Sounders had been tagged as perennial playoff underachievers. The consistent regular-season success, huge crowds they attracted to CenturyLink Field and U.S. Open Cups were all well and good, but without a league title, those accomplishments had begun to ring hollow. TFC are on the brink of the greatest single season and first treble in MLS history, having already lifted the Supporters' Shield and Canadian Cup trophies; yet they also know that without one more win, all those previous victories will be looked upon differently.