The Sounders fall to 4-1-1 at home and L.A. improves to 3-3-2 on the road.
Mariners third baseman and top prospect Colt Emerson made his major league debut and reached base for the first time.
The White House has not released details of the deal, and the company itself has not commented.
Luis Castillo (1-4) earned his first win of the year.
The Sounders (7-1-3) are third in the Western Conference with 24 points.
J.P. Crawford and Luke Raley hit solo home runs for the Mariners.
It’s Seattle’s ninth straight win over the Astros, which extends a franchise record.
Seattle’s Cal Raleigh went 0 for 4 to make last year’s AL MVP runner-up 0 for 36 since his last hit on April 27.
The Sounders (6-1-3) are unbeaten, with five wins, in their last eight games.
Julio Rodríguez scored on a fielding error by Tristan Peters in the first inning.
Listen Live