Dynamo 2, Union 1 - 1st Leg

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The sun gives a glow over the PPL Park and the Commodore Barry Bridge during the Philadelphia Union and Houston Dynamo MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Justin Mapp of the Philadelphia Union holds Adam Moffat of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Gabriel Farfan of the Philadelphia Union tackles Danny Cruz of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Goalie Tally Hall of the Houston Dynamo makes a save in a crowd during an MLS soccer playoff game against the Philadelphia Union, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Stefani Miglioranzi and Carlos Valdes of the Philadelphia Union compete for a head ball with Brian Ching of the Houston Dyanmo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Stefani Miglioranzi of the Philadelphia Union tries to block a cross by Brad Davis of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Danny Califf of the Philadelphia Union battles with Will Bruin of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Brian Ching of the Houston Dynamo wins a head ball against Carlos Valdes, Stefani Miglioranzi and Danny Califf of the Philadelphia Union during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Danny Mwanga of the Philadelphia Union is hooked by Adam Moffat of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 2, Union 1 - 1st Leg

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Sebastien Le Toux of the Philadelphia Union clears the ball away from the goal on a head ball by Calen Carr of the Houston Dynamo during an MLS soccer playoff game, October 30, 2011 at PPL Stadium in Chester, Pennsylvania.

Dynamo 1, Union 0 - 2nd Leg

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Luiz Camargo of the Houston Dynamo slide tackles Gabriel Farfan of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Brad Davis of the Houston Dynamo heads the ball against Velijko Paunovic of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Sheanon Williams of the Philadelphia Union tries to steal the ball against Brad Davis of the Houston Dynamo in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Danny Mwanga of the Philadelphia Union strikes the ball while Andre Hainault of the Houston Dynamo defends in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Brains Ching of the Houston Dynamo heads the ball away from Gabriel Farfan of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Sheanon Williams of the Philadelphia Union heads the ball against Danny Cruz of the Houston Dynamo in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Luiz Camargo of the Houston Dynamo shields the ball from Danny Califf of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Calen Carr of the Houston Dynamo kicks the ball ahead of Carlos Valdes of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Carlo Costly of the Houston Dynamo shields the ball against Brian Carroll of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Luiz Camargo of the Houston Dynamo knocks over Carlos Valdes of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

(Photo by Thomas B. Shea/Getty Images)

Carlo Costly of the Houston Dynamo strikes the ball against Carlos Valdes of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.

Dynamo 1, Union 0 - 2nd Leg

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Bobby Boswell of the Houston Dynamo heads the ball against Jack McInerney of the Philadelphia Union in the second leg of the playoffs on November 3, 2011 at Robertson Stadium in Houston.