The offense got the Seahawks the lead late in the first half against the Cardinals and the defense stretched it out in the third quarter.
Defensive back Coby Bryant snatched a Kyler Murray pass out of the air on a fourth down and returned it 69 yards for a touchdown. Murray delivered the pass while being pressured by cornerback Devon Witherspoon, who blitzed inside and then pivoted quickly to chase down Murray as he rolled right looking for a receiver.
The Seahawks were flagged for unsportsmanlike conduct after Bryant did a Marshawn Lynch imitation on his way into the end zone and kicker Jason Myers missed the extended extra point.
That leaves the score 13-3 with under seven minutes to play in the third.
