The Blazers got 12 points apiece from Raymond Felton and Nicolas Batum.
Kevin Durant was held to just 8-for-26 shooting from the field for 19 points for the Thunder, who fell to 5-2 with a second straight loss.
James Harden filled in for Thabo Sefolosha and led Oklahoma City with 23 points.
Gal Gadot cast as Wonder Woman for 'Batman vs. Superman'
Jordana Brewster on Paul Walker: 'He was an enormous presence in my life'