FCD got two first half goals from Michael Barrios and then a third from Maximiliano Urruti to seal the three points.
FC Dallas nearly got on the board six minutes into the match as a ball was played over the top of the United defense to Michael Barrios. The Colombian winger made one good touch around his defender to get into the penalty box. Barrios then took one more touch back to the run of Mauro Diaz but the Argentine midfielder's one-time shot would go just wide of the far post.
FCD got the game's first breakthrough in the 14th minute on a play where two of DC's defenders struggled to communicate on the ball. Urruti would force a turn over and Barrios scooped up the ball and fired a shot past United's keeper.
Barrios doubled his tally in the 28th minute on a counter attack. The ball was played over the top from Diaz to Barrios who quickly got into the penalty box and then poked the ball past the United keeper and into the net.
Shortly after halftime, FCD got their third goal from Urruti on another counter attack play in the 52nd minute. Fabian Castillo got the ball on the far sideline, he then sent a through ball into the box found the run of Urruti. The Argentine forward took one touch on the ball around a defender and then pounded it into the back of the net.
DCU had opportunities in the second half as they had a couple chances for penalty kicks to be called. One would finally be called in the 65th minute as Sean Franklin would be brought down in the box by rookie Homegrown defender Aaron Guillen. Fabian Espindola stepped up to take the penalty kick but Chris Seitz would deny him the goal.
Seitz's save help push Dallas to their third shutout of the season.
Just seconds after the penalty kick save, the ball was played out to Barrios on the wings. Just as Barrios made a move around Marcelo, the United midfielder fouled Barrios on a bad challenge. The center official would issue a straight red card on the play to Marcelo.
Late in the game, Dallas nearly got a fourth goal with rookie attacker Timo Pitter getting his first minutes in a Dallas uniform. Urruti got the ball in the box and played an open Pitter but the rookie's shot would go just wide of the goal.
FC Dallas returns to action next week when they host the Columbus Crew.