CORRECTS TO FINAL MATCH, NOT SEMIFINAL - Houston Dynamo's Boniek Garcia (27) celebrates after scoring a goal against DC United during the first half of Game 2 of their MLS soccer Eastern Conference final playoff match, Sunday, Nov. 18, 2012, in Washington. (AP Photo/Luis M. Alvarez)

CORRECTS TO FINAL NOT SEMIFINAL - Houston Dynamo's Boniek Garcia, bottom, and DC United's Chris Korb, top, battle for the ball during the first half of the second game of an MLS soccer Eastern Conference final playoff series match on Sunday, Nov. 18, 2012, in Washington. (AP Photo/Luis M. Alvarez)

CORRECTS TO FINAL MATCH, NOT SEMIFINAL - Houston Dynamo's Will Bruin (12) and DC United's Emiliano Dudar, right, try to head the ball during the first half of the second match of their MLS soccer Eastern Conference final playoff series, Sunday, Nov. 18, 2012, in Washington. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Brad Davis, center, holds the trophy as he celebrates with teammates after their MLS soccer Eastern Conference final playoff series match, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Brad Davis, center, holds the trophy as he celebrates with teammates after their MLS soccer Eastern Conference final playoff series match, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Brad Davis, center, holds the trophy as he celebrates with teammates after their MLS soccer Eastern Conference final playoff series match, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Bobby Boswell, left, and Brad Davis, right, celebrate after their MLS soccer Eastern Conference final playoff series match against D.C. United, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Brad Davis, center, holds the trophy as he celebrates with teammates after their MLS soccer Eastern Conference final playoff series match against D.C. United, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

DC United's Perry Kitchen (23) heads the ball as Houston Dynamo's Brad Davis (11) defends during the first half of the second game of an MLS soccer Eastern Conference final playoff series on Sunday, Nov. 18, 2012, in Washington. The Dynamo tied DC United 1-1 on Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

D.C. United's Nick DeLeon (18) moves the ball as Houston Dynamo's Boniek Garcia (27) and Kofi Sarkodie (8) defend during the first half of the second match of their MLS soccer Eastern Conference finals playoff series, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's goalkeeper Tally Hall (1) catches the ball as DC United's Maicon Santos, right, plays the ball during the first half of the second game of an MLS soccer Eastern Conference final playoff series match on Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying DC United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Ricardo Clark and DC United's Nick DeLeon, right, go up for a header during the first half of the second game of an MLS soccer Eastern Conference final playoff series match on Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying DC United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Houston Dynamo's Will Bruin, left, kicks the ball as D.C. United's Emiliano Dudar (19) defends during the second half of the second game of an MLS soccer Eastern Conference final playoff series, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)