Diego Valeri scored on a penalty kick in the opening minutes and the Portland Timbers rolled to a 4-2 victory over the Cascadia Cup rival Vancouver Whitecaps on Sunday.
Jack McInerney, Dairon Asprilla and Darlington Nagbe also scored to help the Timbers snap a three-game losing streak.
Christian Bolanos and Pedro Morales scored for Vancouver. The Whitecaps had won three straight,
The match was part of Major League Soccer's Rivalry Week, but the rivalry between the Timbers and the Whitecaps stretches back to 1975 when both teams were part of the NASL -- long before either team joined MLS.
Fans of the two teams, along with supporters of the Seattle Sounders, created the Cascadia Cup in 2004 for the winner of the three-way contest between the teams, based on points. The Sounders are the reigning Cascadia Cup champions.
San Jose's Fatai Alashe scored a late equalizer to earn the Earthquakes a 1-1 draw with the LA Galaxy.
Alashe ran to the top of the six-yard box and his header, off Chad Barrett's cross, found the back of the net in the 87th minute.
LA had taken the lead just moments earlier when San Jose's Marvell Wynne, attempting to clear a cross from Sebastian Lletget, scored an own goal.
The Galaxy has not lost since in its past nine games, moving within one result of matching the team's record unbeaten streak of 10 games set in 2014.
The Earthquakes haven't won in Carson since 2012.