DENVER (AP) — The Super Bowl teams slogged through a preseason opener delayed by lightning and a flurry of flags Thursday night before linebacker Steven Jackson’s end zone interception of Terrelle Pryor’s pass sealed the Denver Broncos’ 21-16 win over the Seattle Seahawks.

In between a 46-minute delay, both starting offenses put together long touchdown drives that ate up more than 9 minutes and were kept alive by a wave of yellow flags.

Altogether, there were 25 accepted penalties, 13 on Seattle and a dozen on Denver.

Ronnie Hillman’s 1-yard TD run capped Denver’s 14-play, 61-yard drive in which Peyton Manning completed 9 of 11 passes for 63 yards and the officials threw six flags, including one for offsetting penalties.

RAVENS 23, 49ERS 3

BALTIMORE (AP) — Joe Flacco needed just one drive to show how effective the Baltimore Ravens’ offense can be under Gary Kubiak.

Flacco produced an 80-yard touchdown march in his only series, and the Ravens beat San Francisco in a preseason opener.

It was the third time in three tries that Ravens coach John Harbaugh got the best of his brother, Jim Harbaugh, coach of the 49ers. Baltimore previously defeated San Francisco on Thanksgiving 2011 and in the Super Bowl ending the 2012 season.

In this one, each team played its starting unit for one series before the backups took over.

After Colin Kaepernick moved the 49ers 66 yards for a field goal, Flacco made himself right at home in Kubiak’s variation of the West Coast offense, going 4 for 5 for 52 yards.

CHIEFS 41, BENGALS 39

KANSAS CITY, Mo. (AP) — Sean Smith and Malcolm Bronson returned interceptions for touchdowns, De’Anthony Thomas brought back a punt 80 yards for another score and Kansas City beat Cincinnati in its preseason opener.

Andy Dalton was sharp in his only series for the Bengals after signing a new six-year deal this week. He hit wide receiver A.J. Green for a 53-yard pass to set up the opening field goal.

He quickly gave way to backup Jason Campbell, who was just 6 of 15 for 72 yards. And while he threw a pair of touchdown passes, he also was responsible for the pick-6s by Smith and Bronson before getting banged up midway through the third quarter.

The Bengals’ Dre Kirkpatrick also returned an interception for a touchdown.

JETS 13, COLTS 10

EAST RUTHERFORD, N.J. (AP) — Michael Vick led the New York Jets on a touchdown drive, capped by fellow newcomer Chris Johnson’s 1-yard scoring run, in a victory over Indianapolis in the preseason opener for both teams.

Geno Smith, looking to retain his starting job in his second season, was 4 of 6 for 33 yards in two series with the first-team offense that included a 51-yard field goal by Nick Folk before giving way to Vick. The 34-year-old backup received a hearty cheer from the crowd at MetLife Stadium, and moved the starting offense for the Jets down the field against the Colts’ second-team defense.

The 14-play drive was helped by two 15-yard penalties on the Colts. Vick was 3 of 6 for 17 yards.

Andrew Luck played just one efficient drive, going 4 of 5 for 53 yards and leading Indianapolis to a field goal.

CHARGERS 27, COWBOYS 7

SAN DIEGO (AP) — New backup quarterback Kellen Clemens threw a 70-yard touchdown pass to Dontrelle Inman midway through the third quarter and the San Diego Chargers beat the Dallas Cowboys 27-7 Thursday night in an exhibition opener.

Inman, who played in the CFL the last two seasons, beat single coverage down the right sideline and was gone to give San Diego a 17-7 lead.

Clemens made his Chargers debut after signing as a free agent in March and replacing Charlie Whitehurst as backup to Philip Rivers. Clemens spent the last two seasons with the St. Louis Rams as a backup to starter Sam Bradford. He started the last nine games after Bradford went down with a knee injury.