DENVER - Lightning added about 45 minutes to the first quarter, but Denver emerged with a victory in a game full of penalties.
At 7:42 p.m., with just 90 seconds remaining in the first quarter, officials declared a delay because of lightning in the area.
It was originally supposed to last 20 minutes, 10 for the weather and 10 for another warmup. However, that timetable was delayed twice.
The teams returned to the field to warm up around 8:20 p.m. and play resumed just before 8:30 p.m.
Before the game was put on hold, yellow flags peppered the field during the first half. In total, eight were called against Denver and six against Seattle before halftime.
By the end of the game, Seattle had 13 penalties for 131 yards and Denver had 12 for 95 yards.
-- Final score --
Broncos beat the Seahawks 21-16
-- Game summary --
Denver's Peyton Manning was the first quarterback to lead his offense onto the field. They achieved one first down in that first series, but did not make it far down the field.
Running Back Ronnie Hillman started in place of Montee Ball, who underwent an appendectomy a few days ago. Hillman was given three opportunities to run in the first series and covered a total of two yards. Wide receiver Demaryius Thomas made once reception for 15 yards and the first down.
Seattle quarterback Russell Wilson had a similarly slow start, with three incomplete passes during his first series. The Seahawks had to punt after the third.
Despite a series of penalties, primarily called against the Broncos, Denver managed to keep the ball on offense for over nine minutes and overcome the penalty yardage for two first downs. The second, another 9-yard completion to Thomas, set them up for first and goal at Seattle's 10.
Denver chipped away at those last ten yards, finally scoring with a run over the middle by Hillman for the touchdown.
The last 90 seconds of the first quarter passed without incident after the lightning delay.
The second quarter started with more of the same: yellow flags spent more time on the field than in the officials' pockets. Four penalties were called against the Broncos, including one against Danny Trevathan for defensive pass interference in the end zone.
Wilson and the Seahawks offense spent nearly 9 minutes on the field before running back Christine Michael carried it one yard over the goal line.
When the Broncos returned on offense, Brock Osweiler lined up behind center. Because it is the pre-season, Manning and the other starters were not expected to take many snaps.
Running back CJ Anderson suffered an apparent concussion on a 3-yard play during the series, which later ended with a 54-yard field goal attempt by Matt Prater that missed wide left.
Seattle's backup quarterback, Tarvaris Jackson, took over for Wilson in the final minutes of the second quarter. He threw for 46-yards and kicker Steven Hauschka put 3 on the board with a 41-yard field goal kick.
Jackson remained in the quarterback position at the start of the second half. The series lasted only about 90 seconds, ending with a sack for -10 yards by Broncos defensive tackle Marvin Austin.
Five penalties on consecutive plays made the next Broncos possession seem to last forever, but only 3:21 elapsed off the clock before Denver took the lead with a 3-yard running touchdown by Kapri Bibbs. The extra point was good off the foot of Mitch Ewald.
Terrelle Pryor was the third quarterback to take the field for the Seahawks, piloting the offense down the field with several short passes and one 26-yard completion to wide receiver Bryan Walters. Hauschka ended the drive with a 40-yard field goal to bring Seattle within 1.
The first turnover of the game came just before the clock ran out on the third quarter, with Seattle cornerback A.J. Jefferson intercepting a pass from Osweiler that was intended for Bibbs. The Seahawks started the fourth quarter on Denver's 24 yard line.
That turnover led to a go-ahead field goal for the Seahawks by Hauschka after a slow drive that lasted 3:38.
Denver regained the lead with 7:22 remaining on a scoring pass from Osweiler to wide receiver Jordan Norwood. The 34-yard pass capped a 4-minute, 80-yard drive and Ewald's extra point boosted the Broncos to a 16-21 lead.
The second turnover of the game came in the end zone off a tipped pass from Pryor intended for Ricardo Lockette. Linebacker Steven Johnson caught the interception and ran it back for 27 yards.
Osweiler kneeled to run out the final two minutes.