Houston Dynamo forward Will Bruin (12), center, celebrates with defender Jermaine Taylor (4) and forward Calen Carr (3) after scoring a goal against the Chicago Fire during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Chicago Fire goalie Sean Johnson (25) reacts after Houston Dynamo forward Will Bruin scored during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Houston Dynamo defender Bobby Boswell (32) and Chicago Fire forward Chris Rolfe (18) battle for the ball during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Chicago Fire midfielder Alvaro Fernandez, left, and Houston Dynamo midfielder Ricardo Clark (13) battle for the ball during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Houston Dynamo midfielder Ricardo Clark (13) battles for the ball with Chicago Fire midfielder Pavel Pardo (17) during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Houston Dynamo midfielder Adam Moffat (16) and Chicago Fire forward Chris Rolfe (18) battle for the ball during the first half of their playoff MLS soccer match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Houston Dynamo midfielder Adam Moffat (16) celebrates with midfielder Ricardo Clark (13) against the Chicago Fire after their MLS soccer playoff match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. Houston won 2-1. (AP Photo/Nam Y. Huh)

Houston Dynamo midfielder Adam Moffat (16), left, celebrates with goalie Tally Hall (1) after they defeated the Chicago Fire 2-1 in an MLS soccer playoff match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. (AP Photo/Nam Y. Huh)

Houston Dynamo forward Calen Carr, right, and Chicago Fire defender Jalil Anibaba (6) battle for the ball during the second half of their MLS soccer playoff match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. Houston won 2-1. (AP Photo/Nam Y. Huh)

Chicago Fire forward Sherjill MacDonald (7) reacts after missing a pass against the Houston Dynamo during the second half of their MLS soccer playoff match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. Houston won 2-1. (AP Photo/Nam Y. Huh)

Houston Dynamo forward Calen Carr (3) controls the ball against Chicago Fire defender Austin Berry (22) during the second half of their MLS soccer playoff match, Wednesday, Oct. 31, 2012, in Bridgeview, Ill. Houston won 2-1. (AP Photo/Nam Y. Huh)

Houston Dynamo goalie Tally Hall (1) yells to his teammates during their match against the Chicago Fire in the second half of an MLS soccer playoffs on Wednesday, Oct. 31, in Bridgeview, Ill. The Dynamo won 2-1. (AP Photo/Nam Y. Huh)

Chicago Fire midfielder Patrick Nyarko (14) passes the ball against Houston Dynamo midfielder Brad Davis (11) during the second half of an MLS soccer playoffs on Wednesday, Oct. 31, in Bridgeview, Ill. The Dynamo won 2-1. (AP Photo/Nam Y. Huh)

Houston Dynamo midfielder Brad Davis (11) controls the ball against Chicago Fire Austin Berry (22) during the second half of an MLS soccer playoffs on Wednesday, Oct. 31, in Bridgeview, Ill. The Dynamo won 2-1. (AP Photo/Nam Y. Huh)