Hernán López scored in his second straight match, but the San Jose Earthquakes allowed three goals in the final 16 minutes of regulation and another in extra time in a 4-2 loss at Portland, Oregon, on Wednesday night.
The Quakes (3-9-1) had won three in a row to move out of last place in the 14-team Western Conference, but fell back to the bottom of the standings with the loss.
The Timbers (3-6-4) snapped a nine-game winless streak kept San Jose winless all-time at Providence Park.