Seattle's Qwest Field, with more than 36,000 in attendance, hosted the clash which ended 1-1 but it seemed the home side had a heap of excuses during the aftermath.
Former Chelsea and Rangers striker Spencer, who is usually very theatrical and passionate on the sidelines, said he was very calm during the match as he felt his Timbers were well on top and also had some parting words to say at the excuse-laden Sounders.
"We dominated the game," Spencer said. "And it was probably the quietest I've been on the sideline throughout the season, because never once did I feel we were in trouble of losing the game at all.
"It seemed to me that they had 50 excuses before the game written down why they never beat us 3- or 4-nil at home.
"If it's too wet up there to play soccer then they might want to move that franchise, because it (pours) down rain nearly every time I've been in Seattle," he added.
"Next time we go up there, we're going to take plenty of towels for them so we can dry the field off before the game, and maybe take plenty of tissue paper so they can dry their eyes after the game."