SANTA CLARA, Calif. — Quarterback Russell Wilson passed for 236 yards and a touchdown, running back Marshawn Lynch rushed for 104 yards on 20 carries, and the Seattle Seahawks defeated the San Francisco 49ers 19-3 Thursday night in a showdown between NFC West foes.

The Seahawks (8-4) pulled to within 1 1/2 games of Arizona (9-2) in the West and improved their position in the wild-card playoff race. The 49ers (7-5), meanwhile, fell 2 1/2 games behind the Cardinals, and suffered a blow to their wild-card hopes.

Seahawks cornerback Richard Sherman intercepted two passes, and Steven Hauschka made all four of his field goal attempts, connecting from 21, 35, 40 and 46 yards.

Wilson completed 15 of 22 passes and had a passer rating of 118.8.

The Seahawks and 49ers met for the first time since Seattle’s 23-17 victory Jan. 19 in the NFC Championship game at Seattle. Seattle defeated San Francisco for the fourth time in the past five meetings but for the first time on the road since Oct. 26, 2008. The teams will meet again Dec. 14 at Seattle.

Seattle’s defense, ranked No. 1 in the NFL, held the 49ers to 164 total yards. Seattle gained 379 yards against a 49ers defense that came into the game ranked No. 2 in the league.

San Francisco quarterback Colin Kaepernick had another rough day against the Seahawks, completing 16 of 29 passes for a season-low 121 yards with two interceptions and a passer rating of 36.7, another season worst. Entering the game, Kaepernick had a career passer rating against Seattle of 54.0 with seven interceptions and three touchdowns.

The Seahawks took the opening kick in the second half and marched 65 yards in 11 plays for Hauschka’s 35-yard field goal, increasing their lead to 16-0 with 8:05 left in the third quarter.

San Francisco answered with Phil Dawson’s 40-yard field goal with 1:09 remaining in the third quarter, capping a 12-play, 59-yard drive that took 6:59.

Seattle built a 13-0 halftime lead, outgaining the 49ers 204 yards to 71. Wilson threw for 158 yards and one touchdown with a passer rating of 128.0 in the first half. Kaepernick had 55 passing yards with one interception and a rating of 26.8.

The Seahawks grabbed a 7-0 lead with 1:29 left in the first quarter on Wilson’s 13-yard touchdown pass to running back Robert Turbin.

Seattle drove 45 yards in seven plays for the score, capitalizing on Sherman’s interception of a Kaepernick pass. Kaepernick tried to hit wide receiver Brandon Marshall on a back-shoulder throw deep down the right sideline, but his pass sailed too far, right into Sherman’s arms.

On third-and-7 from San Francisco’s 34, Wilson hit wide receiver Doug Baldwin for 24 yards on a shallow crossing route. Two plays later, Wilson looked right then threw back to his left, finding a wide-open Turbin along the left sideline. Turbin caught Wilson’s pass at the 12, turned upfield and sprinted into the end zone.

Seattle increased its lead to 10-0 with 11:07 remaining in the first half on Hauschka’s 21-yard field goal, capping a seven-play, 63-yard drive. Facing third-and-9 from the Seahawks’ 36, Wilson scrambled up the middle, bought time, then tossed a short pass to tight end Tony Moeaki, who was wide open along the right sideline. Moeaki kept running for a 63-yard gain to the 49ers 1-yard line, where cornerback Chris Culliver made a touchdown-saving tackle.

Hauschka drilled a 36-yard field goal with 5:40 left in the half, making it 13-0. Wilson’s 34-yard screen pass to Turbin was the key play on the 42-yard drive.

NOTES: The 49ers activated TE Garrett Celek from the physically-unable-to-perform list, promoted TE Asante Cleveland from their practice squad to the 53-man roster, placed TE Derek Carrier on injured reserve and waived LB Chase Thomas before the game. … 49ers RT Anthony Davis (concussion) missed his second straight game, and OT Jonathan Martin started again in his place. … Seahawks C Lemuel Jeanpierre moved into the starting lineup, replacing C Patrick Lewis.