Cam Weaver and Brad Davis scored in the first half, leading the Houston to a 3-0 victory over CF Monterrey on Sunday night.
Jason Garey scored in the second half for Houston.
The international friendly featured eight yellow cards and two red cards as three players and Monterrey head coach Victor Manuel Vucetich were ejected.
Weaver picked up a deflected pass outside the box, came charging in and banged a line drive from 20 yards out on the right side into the lower left net in the 12th minute.
Luiz Camargo earned the Dynamo a penalty kick in the 22nd minute after being taken down in the box by a hard tackle by Monterrey's Severo Meza on a run. Davis made it 2-0 after putting the kick in the lower right net as Monterrey's Jonathan Orozco went to the left.
Garey scored in 70th minute off a free kick by Davis, chesting the ball into the left net from inside the goalkeeper box.
''It was pretty dramatic for about 45 minutes,'' Dynamo coach Dominic Kinnear said. ''Obviously the cards take away from the game. I thought we played some real nice football tonight. The guys looked comfortable and I thought they enjoyed that.''
Monterrey's best chance to score came in the 83rd minute off a direct kick, but Marvin Pinon's shot was batted away by Houston's Tyler Deric.
There were several altercations in the first half, and Monterrey played the game a man down after Luis Ernesto Perez was given a red card in the 30th minute for elbowing Davis in the face.
Monterrey, which won the CONCACAF Champions League, lost another man in the 45th minute as Humberto Suazo was given a red for elbowing Houston's Hunter Freeman in the face.
''It's just disappointing, you can't go out and enjoy the game as much as you want to,'' Dynamo defender Geoff Cameron said. ''I think we showed some good character tonight by not letting it get in our heads or affect us.''
Houston's Adam Moffat was ejected in the 87th minute after picking up his second yellow card of the match.
Monterrey head coach Victor Manuel Vucetich was also ejected in the 68th minute.
''Very happy with the fans, with the way they supported us tonight,'' Vucetich said. ''We're just very ashamed that the result was not there for us tonight. It was a harsh game, there is no arguing that, and the fact that the refereeing wasn't too favorable toward our team probably had something to do with performance of our team.''
