Players of the game
Running back Marshawn Lynch rushed for 122 yards Sunday, 100 of those yards coming in the second half. The Cowboys defense has allowed an opponent to rush for 100 yards five times in their past 21 regular-season games, and Lynch is responsible for two of those games. He gained 135 yards against Dallas last year.

Tight end Anthony McCoy caught five passes for 41 yards -- both team-highs -- and scored on a 22-yard pass in the third quarter. It was the first touchdown pass caught by a Seahawks tight end in more than a year.

Play of the game
Seahawks' linebacker Malcolm Smith came off the edge and blocked Dallas' first punt attempt of the game, the ball bouncing to safety Jeron Johnson, who returned it 3 yards for a touchdown. It was the second time Seattle scored on a blocked punt in the span of six regular-season games.

Turning point
Lynch's 36-yard run in the middle of the third quarter was not only the longest play for either team, but it was the tipping point for Seattle's offense. Seattle had started that possession leading by six at its own 10-yard line, and the Seahawks proceeded to run the ball on five of the first six plays of the drive. The last of those five running plays was a Lynch's 36-yard run. Seattle scored a touchdown two plays later and never looked back.

Seahawks surprises
The Seahawks beat the Cowboys by 20 points, Seattle's largest margin of victory at home since beating San Francisco 31-6 in the 2010 season-opener.

Seattle held Dallas to 86 yards of offense in the second half, 51 of those coming on the Cowboy's final three plays.

By the numbers
113 -- minutes Seattle played this season before scoring its first rushing touchdown this season.

3 -- scoring drives of longer than 50 yards for the Seahawks Sunday. They didn't have a scoring drive longer than 33 yards in Week 1.

2 -- possessions Dallas started outside its own 20-yard line.

2 -- possessions Seattle started on Dallas' half of the field.

Injuries
Seahawks: CB Byron Maxwell suffered a first-half hamstring injury that knocked him out of the game. WR Sidney Rice did not play after he was hit going over the middle in the second half, but coach Pete Carroll said he was not among the players injured Sunday.

Quoteworthy
Dallas coach Jason Garrett: "Obviously you want to be more physical. You want to physically dominate them. In this game we certainly didn't do that."