Defender Yeimar Andrade gave Seattle a first-half lead, but his own-goal early in the second half helped Minnesota United gain a 1-1 draw with the Sounders.
Seattle's Stefan Frei finished with three saves for his league-leading 10th clean sheet of the season and Pedro Gallese saved two shots as Orlando City played the Sounders to a scoreless tie.
Brenner Souza da Silva scored in the 63rd minute and Roman Celentano made it stand up as FC Cincinnati blanked the Seattle Sounders 1-0 on Saturday night.