Ricardo Clark and Raul Rodriguez scored and the Houston Dynamo prevented the Vancouver Whitecaps from taking first place in the Western Conference with a 2-0 win.
Erick Torres deflected a cross from Shaenon Williams, setting up a sliding goal by Clark from just inside the six-yard box in the 34th minute.
Kendall Watson and Matias Laba were shown red cards, putting Vancouver down to nine men for nearly 30 minutes of action.
Rodriguez capped the scoring in the 87th minute, putting away a corner kick by Brad Davis with a header from the right side of the six-yard box to the far corner.
Vancouver's Darren Mattocks slipped behind the Houston defense early in the match, but the save by Tyler Deric thwarted the Whitecaps' best scoring opportunity -- one of just three shots on goal.
Houston, which snapped a three-game winless streak, is three points behind San Jose for the final playoff spot in the West.
Michael Bradley and Jozy Altidore scored and Toronto FC beat the Montreal Impact 2-1 on Saturday to match their franchise season record with 11 victories.
Toronto FC also won 11 games last year and has nine games left -- seven at home -- as it pushes for a first playoff berth.
Bradley opened the scoring in the 35th minute with his fourth goal of the season.
Altidore connected in the 55th, hammering in a rebound for his 10th goal after Jonathan Osorio hit the post. Altidore has three goals in the last two games, all coming off the bench.
Star forward Sebastian Giovinco limped off the pitch in the 51st minute, just hours after earning a call-up to the Italian national team.
Former Toronto striker Dominic Oduro scored for Montreal in the 74th minute.
Justin Meram scored in the 83rd minute and the Columbus Crew beat New York City FC 2-1 on Saturday to move into second place in the Eastern Conference.
The Crew capitalized on a takeaway near midfield, leading to an opening for Meram up the left side. His shot rolled through a couple of defenders and bounced home off the inside of the far post.
Federico Higuain opened the scoring with a hard-bouncing header off Wil Trapp's corner in the 10th minute.
Andrew Jacobson tied it for NYCFC in the 20th minute with a blast from far outside the box.
Diego Fagundez became the youngest player to score 25 career MLS goals and the New England Revolution beat the Philadelphia Union 1-0 for their third straight victory.
Fagundez, who is 20 years, 6 months, 15 days old, signed with the Revolution on Nov. 15, 2010, and is in his fifth MLS season.
The Revs scored in the 51st minute when Charlie Davies flicked a leading pass to Fagundez, who drove to the top of the area and cut it back inside the left post.
Referee Chris Penso showed Cristian Maidana a red card for violent conduct in the 94th minute.
The Union missed an opportunity to move into an Eastern Conference playoff position, starting the game one point behind three teams tied for the sixth and final slot.
Kevin Doyle broke a tie in the 76th minute and the Colorado Rapids held on to beat Sporting Kansas City 2-1 for its third straight victory.
Vicente Sanchez's cross reached Doyle and his header from edge of the six-yard box gave Colorado the advantage.
Sporting's Dom Dwyer nearly tied it in the 87th minute, but Clint Irwin denied him from close range and the follow-up hit the post.
Dwyer opened the scoring in the 47th minute, and Maynor Figueroa tied it in the 53rd.
Kansas City has lost three straight.
Tesho Akindele and Fabian Castillo scored to help FC Dallas beat Real Salt Lake 2-0.
FC Dallas got on the board in the 51st minute on a dicey penalty in the area. Akindele seemed to lose footing, but Javier Morales was whistled for a tackle. He then earned a booking for arguing the call. Akindele buried the penalty shot.
Castillo scored in the 79th minute.
RSL has lost four of their past five.
Meanwhile in Florida, Orlando City SC capitalized on Chicago's own goal to draw with the Fire 1-1 in a game delayed by lightning and rain.
Lewis Neal lobbed a pass into the center of the box for Cyle Larin that Chicago's Eric Gerhig attempted to clear, but his header slipped past goalkeeper Sean Johnson and tied it in the 37th minute.
David Accam dribbled from the end-line into the center of the box and fired a right-footer into the bottom-corner at the near post to give the Fire a 1-0 lead about 7 minutes earlier.
Darwin Ceren's shot from just outside the box in extra time was deflected by a diving, one-handed save by Johnson to preserve the tie and earn a critical point for the Fire.
Orlando City took over sole possession of the final playoff spot in the Eastern Conference. Chicago is two points behind Orlando City but also trails Montreal and New York City FC.
Heavy rain and lightning delayed the game for nearly an hour.