Aurelien Collin scored the only goal as Sporting Kansas City claimed a 1-0 win at the Houston Dynamo to draw level on points with their opponents in the Eastern Conference on Sunday.
The centre-back headed home in the 73rd minute to halt the Dynamo's unbeaten home run at 36 games.
The result left the two teams level on 20 points and, along with the Montreal Impact, one point behind Eastern leaders New York.
The Portland Timbers went second in the Western Conference with a 3-0 win over Chivas USA.
Rodney Wallace opened the scoring in the 35th minute, Diego Valeri added a second in the 70th minute and Ryan Johnson rounded off the scoring in stoppage time.