Nate Jaqua scored twice, Fredy Montero added a goal and the defending U.S. Open Cup champion Seattle Sounders advanced to the title game with a 3-1 victory over Chivas USA on Wednesday night.
Jaqua scored in the 10th minute and again in second-half stoppage time, and Montero connected in the 58th minute. Jaqua has five goals in Seattle's three Open Cup games.
Steve Zakuani set up the first two goals with perfectly placed crosses from the left side into goalkeeper Zach Thornton's 6-yard box.
Jesus Padilla scored for Chivas USA in the 68th minute.
Last year in the final, the Sounders beat United 2-1.