Henry Wingo's low shot from 19 yards was the difference on Thursday as Seattle Sounders 2 posted a 2-1 win over Portland Timbers 2 in United Soccer League action in front of 2,200 fans at Providence Park.
Wingo's strike in the 72nd minute decided a high-energy match between the rivals.
Bill Tuiloma scored his first goal for T2. Sam Rogers also scored for Seattle.
Sounders 2 improved to 9-13-2 and are in contention for one of the six playoff spots in the USL Western Conference.
Timbers 2 fell to 2-18-3.
Seattle broke through from a free kick in the 59th minute as Rodgers headed home a low delivery from Zach Mathers.
Portland responded three minutes later. Tuiloma, who signed last month with the MLS Timbers, redirected a Jack Barmby corner kick off the inside of the post with a header.
But in the 72nd minute Wingo was able to dribble near the left-wing corner of the penalty area and drive a right-footed shot past a diving Wade Hamilton.
Tuiloma almost tied it with another header from a Barmby corner kick that flashed just wide of the post.
T2 had two looks at a tying goal in stoppage time. Russell Cicerone put a chance high from a Barmby delivery to the far post. Bijev had a difficult header from a corner kick go right to Miller in goal.
The rivalry match saw both teams create numerous chances in a scoreless first half. For Portland Villyan Bijev hit the post and Russell Cicerone hit a shot from 6 yards right at Seattle goalkeeper Tyler Miller after working free inside the penalty area.
Timbers 2 play their next two matches in Texas, visiting San Antonio FC on August 26 and Rio Grand Valley FC on August 30.