For the second time in less than a year, the Seattle Sounders have upset MLS-side Chivas USA in the US Open Cup, defeating the top-flight team 2-0 in last night's third round action at the Starfire Sports Complex in Renton. MLS-bound Sebastien Le Toux and Taylor Graham scored in the contest. The Sounders next face the Kansas City Wizards (another MLS squad) in the quarterfinals at Qwest Field next Tuesday night.......