Chris Wondolowski scored his ninth goal of the season as the San Jose Earthquakes beat the LA Galaxy 3-1 in the California Clasico.
Matias Perez Garcia added two assists for the Quakes, the first on a well-placed cross that Wondolowski smashed into the net in the 28th minute for a 1-all tie. Wondolowski moved alone into second place the MLS goal race, three behind Columbus' Kei Kamara.
Clarence Goodson gave San Jose the lead in the 53rd minute, heading home Perez Garcia's corner kick.
Cordell Cato capped the scoring for the Earthquakes with a patient left-footed finish in the 72nd.
The Galaxy took the lead in the 17th minute on Juninho's 30-yard rocket from straightaway that curled just enough from San Jose goalkeeper David Bingham's diving reach.
Octavio Rivero scored on a penalty in the 31st minute and the Vancouver Whitecaps snapped the New England Revolution's 17-game home unbeaten streak with a 2-1 victory on Saturday night.
The West-leading Whitecaps have won an MLS-best six road games through the first half of the season. New England has lost three straight. It was coming off back-to-back 2-1 losses at Washington and Columbus.
Vancouver grabbed the lead in the 18th minute when Cristian Techera's left-footed shot caromed off Revolution goalkeeper Bobby Shuttleworth's gloves and trickled into the lower left corner.
New England's Andrew Farrell committed a hard foul in the penalty area in the 31st minute, earning a red card and giving Vancouver a spot kick that Rivero converted to make it 2-0.
Teal Bunbury halved the Vancouver lead in the 84th minute, finding a loose ball off a New England set piece and driving it into the middle of the goal.
Maurice Edu punched home a rebound from in front of the Montreal Impact goal in the 76th minute and the Philadelphia Union salvaged a soggy 2-2 draw.
After a Philadelphia corner kick, the ball bounced outside the box and Fabinho fired a shot that goalkeeper Evan Bush stopped but couldn't control. Edu was able to settle the ball and strike home the tying goal.
Eric Ayuk Mbu gave Philadelphia a 1-0 lead, one-timing a shot from the top of the penalty box in the eighth minute. Montreal tied it when Ignacio Piatti right-footed a shot from outside the box into the bottom right corner.
Former Union forward Jack McInerney put the short-handed Impact ahead just minutes after Patrice Bernier was sent off after getting a second yellow card. McInerney settled a pass from Andres Romero at the top of the box and fired a shot into the bottom right corner.
Krisztian Nemeth scored his seventh goal of the season and Sporting Kansas City beat the Colorado Rapids 2-0.
Chance Myers, in his first MLS action since rupturing his Achilles tendon in May 2014, and Benny Feilhaber assisted on Nemeth's goal in the 32nd minute. It was Feilhaber's MLS-leading ninth assist.
Rapids midfielder Sam Cronin conceded an own goal in the 64th minute on a misplay of Feilhaber's cross.
Luis Solignac nearly pulled Colorado even 10 minutes earlier, but his shot missed inches wide of the left post.
Ethan Finlay scored Columbus' second tying goal, helping the Crew earn a 2-2 draw with Real Salt Lake on Saturday night.
Federico Higuain assisted on Finlay's goal in the 62nd minute with a cross that cut back just behind the six-yard box.
Sebastian Jaime made it 2-1 for Real Salt Lake only 25 seconds into the second half. He chased down Abdoulie Mansally's long ball and slipped between Crew defender Emanuel Pogatetz and goalkeeper Steve Clark for a chip shot.
Olmes Garcia finished a four-touch buildup off Luke Mulholland's free kick to open the scoring for RSL in the 36th minute. Tony Tchani tied it 6 minutes later for Columbus on a right-footed smash from just behind the penalty spot.
Real Salt Lake's Jordan Allen received a red card in the 77th minute for a studs-up challenge.
D.C. United's Bill Hamid made a diving save on Sebastian Giovinco in the 67th minute and the Washington club tied Toronto FC 0-0 on Saturday in rainy and windy conditions.
Players had trouble putting passes together in the relentless rain, with wind gusts that had the players' shorts flapping like flags.