It was the biggest win for the Sounders in MLS history, and also the first time it had scored seven goals in a match. It also became the quickest team to score five times in an MLS match, doing so within 33 minutes.
Jordan Morris had a goal and three assists, and Kelvin Leerdam and Joao Paulo also scored for the Sounders (5-2-3, 18 points), who moved into first place in the Western Conference. Seattle extended its unbeaten streak against San Jose to 11 consecutive regular-season matches (6-0-5) dating to 2015.
Chris Wondolowski scored on a penalty kick in the 71st minute as the Earthquakes (2-4-3, nine points) avoided the shutout. Wondolowski extended his all-time MLS goal-scoring record to 163.
Morris opened the scoring in the fourth minute, taking the ball at midfield and dribbling down the middle of the field and past two defenders until he reached the penalty area. He put a 12-yard, left-footed shot past diving San Jose goalkeeper Daniel Vega and just inside the left post.
Ruidiaz made it 2-0 in the 12th minute. Nicolas Lodeiro drove to the end line on the right wing before cutting the ball back to Ruidiaz, who pounded it into the net from about 4 yards out. Jones also got an assist on the play.
Leerdam scored in the 15th minute, taking a pass from Jones and beating Vega with a right-footed shot from the top of the 18-yard box.
Jones scored in the 20th minute after three Seattle players got behind the San Jose defensive line for a breakaway. Ruidiaz passed to Jones, who tapped it into an open net from close range.
Ruidiaz took a through ball from Morris in the 33rd minute and chipped a 15-yard shot over Vega to make it 5-0.
The Sounders scored twice more in the opening 14 minutes of the second half.
Paulo took a pass from Leerdam and put a 15-yard shot into the lower left corner of the net in the 48th minute.
Jones scored his second in the 59th minute, taking a pass from Morris and putting a 10-yard shot into the upper left corner to make it 7-0.
Seattle put club-record 7 past hapless San Jose
The Sounders thrash the Earthquakes with an MLS record five goals in the first 33 minutes. Watch MLS on ESPN+.