Salt Lake improved to 8-3-2, dropping Seattle to 7-2-1 and snapping the Sounders' franchise record-tying winning streak at five games in front of a season-high crowd of 39,312 - the third largest in Seattle MLS history. Seattle, coming off three consecutive shutouts, could have moved into first place with a victory.
Espindola scored on a left-footed shot from the center of the box to the bottom right corner. He returned after missing a 0-0 draw with Chicago on Wednesday night following the birth of his son.
RSL improved to 3-0-2 over the last five matches. Goalkeeper Nick Rimando didn't have to make any saves after missing the game against Chicago because of a shoulder injury.
Real Salt Lake outshot the Sounders 10-8.
RSL now has two weeks off before hosting FC Dallas May 26th.