David Bulow scored the winning goal in the 31st minute.
The Charleston Battery eliminated the defending MLS champion Houston Dynamo, 1-0, in overtime on a rebound of a penalty kick by former MLS player Stephen Armstrong. It was the fourth win by the USL-1 team over an MLS team.
The New England Revolution beat the Rochester Raging Rhinos, the USL-1 co-leaders, 4-2 thanks to late goals by Taylor Twellman and Steve Ralston, the second goals by both players.
Jose Cancela and Herculez Gomez each had a goal and an assist as the Colorado Rapids moved into the quarterfinals with a 3-1 victory over the California Victory.