With 11:37 remaining before halftime, Dak Prescott scored his second touchdown throw of the game, giving the Cowboys a 17-7 lead.
Although the Cowboys had first-and-goal from the Seattle 2 after three possessions, they were unable to score.
On their opening drive, that set up a 30-yard field goal by Brandon Aubrey.
Since then, they've experienced touchdown drives of 75 and 68.
Following a five-yard delay of play, Seahawks kicker Jason Myers missed a 42-yard field goal, and the Cowboys marched down the field.
Tony Pollard gained eleven yards on a fourth-and-one play from the Seattle 47.
A 7-yard pass from Prescott to Brandin Cooks scored a point for the Cowboys.
Prescott hit CeeDee Lamb with a 15-yard pass for their first touchdown.