The Cowboys offered little resistance against the 49ers on the opening drive.
San Francisco took the opening kickoff and marched 75 yards in seven plays to take a 7-0 lead with only 3:50 gone in Sunday Night Football. They did not face a third down.
Brock Purdy found George Kittle wide open in the end zone for a 19-yard score.
Cowboys safety Donovan Wilson had a 15-yard penalty on the opening play, grabbing Christian McCaffrey by the facemask. It got no better for Dallas.
Prudy was 4-of-4 for 43 yards.
McCaffrey had three runs for 12 yards, and Brandon Aiyuk caught two passes for 20 yards.