The offseason upgrades appear to have worked for Toronto, which took the points away at Seattle courtesy of its new big-money striker.
New designated player Jermain Defoe was the man of the hour, scoring twice in the first 30 minutes of his MLS career.
He announced his North American arrival in style in the 17th minute, latching onto an incisive Jonathan Osorio through ball and finishing past Stefan Frei with a well-placed, powerful strike.
By the 24th minute, the Englishman had his new club up by two. Under pressure from the other TFC DP, Michael Bradley, Marco Pappa coughed up a weak backpass, which Defoe plucked from no-man's land, took past two defenders, and lashed into the net.
Seattle's own big name pulled one back in the 68th minute. Clint Dempsey emphatically finished Obafemi Martins' cross to make it 2-1, but it would prove to be a consolation.
The result is Seattle's first loss of the season and gives the Sounders a 1-1-0 record. Toronto jumps out to a 1-0-0 start.