HARRISON, N.J. -- Omar Cummings didn't start the MLS Eastern Conference semifinal match Wednesday, but the Houston Dynamo forward ended it.

Entering in the second half, Cummings scored in the 104th minute to give Houston a 2-1 victory over the New York Red Bulls in the second leg of the semifinals at Red Bull Arena.

The win gave Houston (15-11-9) an aggregate score of 4-3 after the sides tied 2-2 in the first leg, and the Dynamo will face the winner of the New England-Sporting Kansas City series in the conference finals.

Houston was playing its third match in seven days. It eliminated Montreal in a one-game knockout round Thursday.

The Red Bulls (17-10-8) were searching for their first playoff win at Red Bull Arena since it opened in 2010. New York had dropped matches to San Jose (2010), Los Angeles (2011) and D.C. United (2012). The last home playoff victory for New York occurred in 2005 when the franchise was known as the Metro Stars and played its matches at Giants Stadium.

The winning goal came when Cummings slid the ball past Red Bull defenders Markus Holgersson and Ibrahim Sekagya. It trickled past the outstretched hands of Red Bull keeper Luis Robles just over the goal line.

The Houston forward received a head ball from forward Cam Weaver before lightly touching it in for his second goal of the playoffs. Cummings entered the match in the 64th minute.

Dynamo keeper Tally Hall bailed his team out in the 75th minute when he captured teammate Giles Barnes' header off a Red Bulls cross. The own goal would have provided the Red Bulls with the lead.

Henry's best chance of the night came in the 64th minute when his header hit the crossbar. In the 67th minute, his cross from the left side found the head of Tim Cahill, but Hall was right there for the save.

A mistake on the Red Bulls' backline turned into the equalizer for Houston in the 36th minute. Dynamo midfielder Brad Davis intercepted Sekagya's clearing cross right in front of the net and one-timed it from 13 yards out to draw the match even at 1-1.

Forward Bradley Wright-Phillips gave the Red Bulls a 1-0 edge in the 24th minute when he pounced on a cross from Lloyd Sam that the usually sure-handed Hall couldn't control. Wright-Phillips buried the shot from inside the box for only his second goal since coming to the Red Bulls over the summer as a transfer from Charlton Athletic in England's second division.

Hall redeemed himself in the 42nd minute, tipping away a deflection from Red Bull midfielder Tim Cahill.

NOTES: Jamison Olave, the Red Bulls' top defender, sat out Wednesday after receiving a red card on Sunday. The club was 0-3-2 without him on the pitch this season. Coach Mike Petke moved Holgersson from his natural outside position on the backline to the inside, replacing Olave. Brandon Barklage started on the outside. ... The Red Bulls claimed their first Supporters Shield, given to the team with the most points in the regular season. ... With 17 wins, New York tied its season high, set in 2000 when it was the Metro Stars. ... G Luis Robles, played every minute (3,420) in the net for the Red Bulls this season, tying the club shutout mark with 11. ... MF Brad Davis is Houston's all-time leader in games, starts and assists. ... Dynamo F Brian Ching, the team's all-time leading scorer, is retiring at the conclusion of the playoffs. Ching holds the club record for goals in a season -- 13 in 2008.