MIAMI GARDENS, Fla. — Nine minutes into the season, Lamar Jackson had fans booing his hometown team.
The South Florida native looked unstoppable from the start Sunday, and tied a Ravens record with five touchdown passes to help them humiliate the Miami Dolphins and rookie coach Brian Flores, 59-10.
The Ravens set a franchise record for points in the first half, and an NFL record for points in the first half of an opener, taking a 42-10 lead at the break. They broke franchise marks for points and total yards with 643.
When Jackson emerged from a jubilant locker room, he said the recipe for success was simple.
‘‘The offensive line did a great job — I barely had pressure,’’ he said. ‘‘And the receivers were getting open and catching the ball.’’
Baltimore gained 49 yards on the first play, a run by newcomer Mark Ingram, and hardly slowed down after that. Jeers began when the score reached 14-0, evidence of the impending avalanche already obvious.
Jackson’s first nine passes, all completions, went for 204 yards and four touchdowns, including scores of 47 and 83 yards to first-round draft pick Marquise Brown in the first 11 minutes.
The performance should help dispel the impression Jackson is one-dimensional.
‘‘Not bad for a running back,’’ he said.
His other touchdown passes covered 33 yards to Willie Snead, 5 yards to rookie Miles Boykin and 1 yard to fullback Patrick Ricard. The performance was a big step forward for the Ravens in their transition from Joe Flacco to Jackson, who went 17 for 20 for 324 yards.
‘‘For him to come down here — I was happy for him,’’ coach John Harbaugh said. ‘‘I was impressed with his poise under pressure.’’
Brown, the cousin of NFL receiver Antonio Brown, made four catches for 147 yards.
‘‘He is fast,’’ Jackson said. ‘‘Can’t wait to see more.’’
Ingram, also making his Ravens debut, ran for 107 yards and two scores as Baltimore won its fourth opener in a row.
The rebuilding Dolphins, who host the Patriots next Sunday, are 0-1 for the first time since 2016, and their outlook has rarely seemed so gloomy. The blowout will only heighten speculation they’re headed for a winless season under their new coach.
‘‘It starts with me,’’ said Flores, New England’s former defensive play caller. ‘‘I’ve got to do a better job of coaching this team.’’
He can take small consolation that a drubbing by Baltimore is nothing new. The Ravens have outscored the Dolphins 137-16 in three meetings since 2016.
The Ravens scored touchdowns on their first four possessions, and when they were finally forced to punt, Jakeem Grant fumbled the kick. Baltimore recovered at the 10 and scored again to make it 35-3. Harbaugh then faked a punt from there, and Anthony Levine took the short snap and ran 60 yards to set up another touchdown.
‘‘It was there,’’ Harbaugh said. ‘‘That’s what we do. There was a lot of time left in the game. If they’re going to give us an opportunity to run a play, we’re going to execute it.’’
The Ravens’ final touchdown came when Robert Griffin III threw for a score on fourth-and-3. Flores had no quarrel with either call.
‘‘It’s our job to stop them; it’s not their job to let off,’’ Flores said. ‘‘We’re not looking for handouts here.’’
‘‘It’s never good to be embarrassed like that,’’ said Miami quarterback Ryan Fitzpatrick, who had little time to throw in his Dolphins debut, and finished 14 for 29 for 185 yards and one score.
Josh Rosen replaced Fitzpatrick to cheers late in the third quarter and went 1 for 3 for 5 yards.
Announced attendance was 65,012. The actual crowd was about half that, and could be a sign of things to come for Miami, with many South Floridians disenchanted about the direction of the franchise.