GALLERY: Early onslaught powers Seahawks past 49ers

York greets fans

49ers CEO Jed York signs autographs for fans prior to the team's game against the Seahawks on Sunday, Nov. 22, 2015.

Big Unit raises flag

Former Giants and Mariners pitcher Randy Johnson talks to actor Will Ferrell prior to Sunday's game. Johnson raised the Seahawks' 12th Man flag during pregame ceremonies.

Dorsey hurt

On their first defensive snap of the afternoon, the 49ers lost defensive lineman Glenn Dorsey to a right knee injury. He was carted off the field and replaced by rookie Arik Armstead.

Seahawks on board first

Five plays after Dorsey left the game, the Seahawks got on the board first with a 24-yard touchdown pass from Russell Wilson to Tyler Lockett.

Beast Mode's replacement scores

After the 49ers went three and out on their second possession, the Seahawks took their second possession 59 yards on 11 plays and capped it off with a 2-yard touchdown run from Thomas Rawls, who was filling in for an injured Marshawn Lynch. Seattle led 13-0 after the extra point was missed.

Lockett scores again

After scoring on their first two drives, the Seahawks scored on their third. On a drive that took 7:37, Russell Wilson hit Tyler Lockett again, this time for an 11-yard touchdown to put Seattle up 20-0 in the second quarter.

49ers strike before halftime

Trailing 20-0, Blaine Gabbert engineered a nine-play, 92-yard drive that took just 1:31 and finished with a 19-yard touchdown pass to Vance McDonald, the first score of the tight end's career.

49ers add field goal

The 49ers forced a Seahawks' punt on the opening drive of the first half. On their first drive, San Francisco cashed in with a 27-yard field goal by Phil Dawson. But Seattle answered back with a 33-yard field goal from Steven Hauschka to push their lead to 23-10.

Dawson called on again

On their final possession of the third quarter, the 49ers stalled at the Seahawks' 7-yard line and settled for a 25-yard field goal from Phil Dawson to cut the deficit to 23-13.

Rawls finishes 49ers off

The Seahawks put the game away early in the fourth quarter when Russell Wilson hit Thomas Rawls for a 31-yard touchdown pass to put Seattle up 29-13. Rawls finished with 209 rushing yards, 46 receiving yards and two total touchdowns.

Gabbert impresses

In his second start with the 49ers, Blaine Gabbert completed 22-of-34 passes for 264 yards and one touchdown. He ran the ball four times for 22 yards in the 49ers' 29-13 loss to the Seahawks.