The Western Conference rivals picked up key late wins on Saturday, while Sporting Kansas City picked up some jewelry for its work last year.
Check out some of the best images from across the league...
Patrick Mullins (right) opened his MLS account in style as New England won in Toronto
Kekuta Manneh (center) celebrates his goal in Vancouver's win over San Jose
Kyle Beckerman gives Joao Plata a lift after the Ecuadorian scored a late winner in Chicago
Vicente Sanchez and A.J. DeLaGarza battle in Colorado's 1-0 win over the Galaxy
Vincent Nogueira goes by Djimi Traore, but Seattle picked up another win against the Union
Chris Rolfe is dejected after Maximiliano Urruti gave Portland its first win of the season with a late goal
Houston found the perfect remedy for its recent struggles in league-worst Chivas USA
Je-Vaughn Watson's early red card turned the tide as New York saw off FC Dallas
Sporting Kansas City received its MLS championship rings before it took on Columbus on Sunday
Jacob Peterson's early goal proved to be the winner in Sporting KC's 2-0 win over the Crew