Ned Grabavoy also scored against his former team as Salt Lake (7-5-3) won a second straight and extended its unbeaten streak to four matches.
RSL scored all three of its goals in the first half, when it outshot the Earthquakes 12-0.
San Jose (3-6-6) got five saves from goalkeeper Jon Busch.
UPI Sports Results for September 20, 2014
UPI Sports Results for September 19, 2014