The Galaxy scored the opener through a first-half penalty kick from Sacha Kljestan, but Yeimar Gomez Andrade scored a 41st-minute equalizer that set the stage for Ruidiaz’s winner early in the second half, moving the Sounders to 6-0-3 and 21 points as Brian Schmetzer’s group extended their current lead atop the Western Conference table.
LA were dealt an early blow when center back Daniel Steres had to sub off after just eight minutes following a collision with Cristian Roldan.
The Galaxy would jump on top, though, after Javier “Chicharito” Hernandez won a penalty kick call as Seattle midfielder Joao Paulo was whistled for a foul in his own box by referee Drew Fischer.
But the Sounders would strike back four minutes from halftime off a thundering header from Gomez Andrade, which was set up by a pinpoint corner kick from Joao Paulo for the Brazilian’s fifth assist of the season.
Seattle then found their go-ahead tally shortly after second-half kickoff courtesy of an opportunistic finish from Ruidiaz.