McCollum finished with 28 points, eight rebounds and six assists as the Trail Blazers won for the 13th time in 14 games at home. Damian Lillard added 20 points despite a 5-for-18 shooting game for Portland.

Russell Westbrook totaled 30 points, 11 rebounds and six assists and Paul George added 21 points for Oklahoma City, which lost for the eighth straight time at Moda Center. Westbrook also struggled with his shooting, making just 12 of 31 shots for the game.

The Thunder were going without starting small forward Carmelo Anthony, who sat out the game to rest.

McCollum scored 13 points and Lillard 11 as Portland took a 53-50 lead into intermission. Westbrook had 14 points and George 11 for the Thunder.

The Blazers scored seven straight points to go on top 73-67 midway through the third quarter. Portland carried an 83-75 edge into the final period.

Zach Collins' 3-pointer gave the Blazers a 92-81 advantage with 8:58 to play. The Thunder closed to within 95-90 on a three-point play by Westbrook with 4:22 remaining. Westbrook's jumper made it 95-92 with 3:59 to play.

McCollum followed with back-to-back baskets to push Portland in front 99-92. OKC's Steven Adams sank 1 of 2 at the line to make it 99-93, but Collins knocked down another 3 for a 102-93 lead with 2:22 left.

A Westbrook 3-pointer got OKC within 102-96, and Jerami Grant followed with a driving layup to trim the difference to 102-98 with 1:39 to play. Lillard hit two free throws for a 104-98 lead with 44.7 seconds remaining.

Oklahoma City jumped to an 18-12 lead. The Thunder settled for a 28-25 advantage after one quarter.

Portland used a 17-2 run to go ahead 44-35 midway through the second quarter. The Thunder closed the quarter with an 8-2 run to draw to within three points at the half.

--Field Level Media