Six games were played on Saturday in Major League Soccer.
Patrick Mullins produced a hat trick (40', 45'+1, 74') as DC United hammered the visiting Chicago Fire 6-2.
At Chester, Pennsylvania:
Roland Alberg (67') and Tranquillo Barnetta (90'+2) each scored once as the Philadelphia Union blanked visiting and nine-man Sporting Kansas City 2-0.
Ignacio Piatti scored the only goal of the match in the 73rd minute as the Montreal Impact, despite finishing the contest with ten men, knocked off Toronto FC 1-0 on the road.
At Columbus, Ohio:
Justin Meram had a hand in both goals, assisting on Ethan Finlay's score in the 32nd minute and converting his own penalty kick in the 84th as the Columbus Crew blanked the injury-plagued San Jose Earthquakes 2-0 at home.
Michael Barrios scored twice (60', 79') and Mauro Diaz once (59') as FC Dallas defeated the Houston Dynamo 3-1 on the road.
At Carson, California:
The visiting Vancouver Whitecaps battled the Los Angeles Galaxy to a 0-0 stalemate.