Duckett opened the scoring with a 24-yard run on Seattle's first possession and produced a one-yard touchdown run in the fourth period that put the Seahawks in front by 14. He gained 71 yards on 11 carries.

Oakland drew within seven points with 1:51 to play on a 25-yard pass from Marques Tuiasosopo to Marcel Reece, but the Seahawks recovered the ensuing onside kick.

Seattle, which ended its exhibition campaign at 3-1, will open its season with a trip to Buffalo. Oakland (1-3) will start out at home against Denver in one of the two games that will be played on the first Monday night of the season.