Danny Hoesen's first-half goal proved to be all San Jose needed to earn three points, as they kept Houston's attack at bay.
Toronto FC made easy work of LA Galaxy in California, despite leaving stars Sebastian Giovinco and Jozy Altidore at home.
Major League Soccer: Victor Vazquez (78') LA Galaxy 0-4 Toronto FC
Major League Soccer: Tosaint Ricketts (76') LA Galaxy 0-3 Toronto FC
Highlights and reports on all of the games from Saturday night's Major League Soccer action.
Albert Rusnak and Jefferson Savarino led RSL to a big win over Portland, despite a historic goal for Diego Valeri.