The Timbers began a rally from 3-1 deficit in the second half when Darlington Nagbe scored on the rebound off a hard Diego Valeri shot in the 56th minute.
They tied it 27 minutes later when substitute Jose Adolfo Valencia launched a shot into the area that bounded off Olave and into the net for the equalizer.
Valeri also netted a first-half tally for the Timbers (0-0-1) in their first game under new head Coach Caleb Porter.
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