Dallas are the only unbeaten team remaining in MLS after a win on Saturday, while Montreal Impact staged a superb comeback.
A 77th-minute goal from Maynor Figueroa saw Dallas end Sporting Kansas City's undefeated start to the season with a 1-0 win.
Oscar Pareja's men are second in the Western Conference, which is topped by Portland Timbers.
Speed from Barrios. Power from . April 23, 2017
Portland continued their strong start to the season with a 2-1 win at home to Vancouver Whitecaps.
Darlington Nagbe opened the scoring for Timbers with a tremendous goal, skipping past two markers before his 20-yard effort went in off the crossbar in the 18th minute.
What. A. Goal. puts the home team up 1-0 with wonder-strike. April 22, 2017
Darren Mattocks doubled the hosts' lead and they claimed all three points despite Fredy Montero's goal just before the hour-mark, the forward putting away a rebound after his penalty was saved.
Montreal Impact produced a stunning comeback to deny Philadelphia Union their first win as they played out a 3-3 draw.
A first-half brace from Roland Alberg either side of a C.J. Sapong goal had Union in control.
Ignacio Piatti pulled a goal back for Montreal prior to the break before a double from Anthony Jackson-Hamel secured a point for Impact.
New York Red Bulls continued their decent start to the campaign with a 2-0 win over Eastern Conference leaders Columbus Crew, while Atlanta United beat Real Salt Lake 3-1.
Houston Dynamo claimed a 2-0 win over San Jose Earthquakes and New England Revolution played out a 2-2 draw against DC United.
