Giant killers Seattle Sounders have done it again, this time putting away the Kansas City Wizards 6-5 in penalties.

Seattle will face fellow USL’ers Charleston Battery (in Charleston) after their impressive 3-1 win at FC Dallas.

DC United slipped past the Chicago Fire at home 2-1 after Bryan Namoff’s 99th minute winner.

They will face fellow MLS’ers New England Revolution after they slipped past Crystal Palace Baltimore 5-3 after ending 1-1 after two overtimes.

image via USOpenCup