According to the NFL network, Norton's contract contains an out clause allowing him to return to Seattle.
According to Seattle media reports, Norton's wife said her husband signed a three-year deal.
Running backs gained only 17 yards on 34 carries inside an opponent's 20-yard line with no touchdowns and just one first down converted.
Seattle's defense was diminished due to the losses of cornerback Richard Sherman, safety Kam Chancellor and defensive end Cliff Avril to season-ending injuries.
WHAT WENT RIGHT: When healthy, Seattle's defense played at a level consistent with their dominance of recent seasons.