Omar Cummings scored in extra time to help the Houston Dynamo advance to the MLS Eastern Conference finals with a 2-1 upset victory over the league-leading New York Red Bulls.
Sporting KC advanced to meet Houston in the conference final with a 3-1 win over the New England Revolution later Wednesday, with Claudio Bieler scoring the series-clinching goal in the 23rd minute of extra time.
Houston won the semifinal return leg 2-1 at Harrison three days after a 2-2 draw at home, advancing 4-3 on aggregate.
Cummings scored in the second minute of stoppage time last weekend to secure the draw for Houston in the first leg.
On Wednesday, he got his foot on a ball that slipped past Red Bulls goalkeeper Luis Robles at the near post.
The Red Bulls finished the regular season atop the standings and had leads in both semifinal games.
On Wednesday, Bradley Wright-Phillips scored in the 23rd minute to give New York the lead before Brad Davis equalized in the 36th.
It remained locked at the end of regulation time and in extra time until Kofi Sarkodie crossed a ball into the box that was headed down by Cam Weaver. Cummings managed to get his foot on the ball and poke it past Robles for the clincher.
The Red Bulls dominated Houston during the regular season, winning all three head-to-head matches, and went into the semifinals on an eight-game unbeaten streak. But the Dynamo extended New York's playoff futility, making the Red Bulls winless in their past six playoff games.
At Kansas City, Bieler's extra-time goal capped Sporting Kansas City's 3-1 win on Wednesday.
The two-match, total-goals semifinal series went to extra time after defender Seth Sinovic scored for Sporting in the 79th minute, giving Kansas City a 2-1 advantage in its home leg and levelling the aggregate at 3-all.
Aurelien Collin knocked in a deflection in the 41st minute for his second goal of the playoffs to give KC an early lead, but Dimitry Imbongo equalized with a header off a free kick in the 70th minute, putting the Revolution up 3-2 on aggregate with 20 minutes remaining.