DAVIE, Fla. — Miami overcame a choppy offensive performance to defeat feckless Jacksonville 27-13 on Sunday.

The defense scored two touchdowns on interception returns, special teams blocked a field goal attempt, and the offense produced a 50-yard reception, a 38-yard reception and two 30-yard runs, but the thing that stood out was offensive inefficiency.

Miami, which led 10-3 at halftime, got off to yet another slow start. The Dolphins have a mere 20 first-quarter points in seven games this season.

“We have to play better,” Philbin said. “I think we had some negative plays that impacted and got us in some long-yardage situations. I didn’t think our third-down passing attack was very good. That has to get better as the year goes on, specifically starting on Sunday against San Diego. There’s certainly a lot of things to work on. I’m confident our guys starting tomorrow will get back to work and improve in those areas.”

Quarterback Ryan Tannehill (16-for-29, 196 yards, one touchdown, one interception, 73.3 passer rating) was leading the charge in saying the offense was sub-standard.

“I’m not happy about the way we played offensively,” he said. “We have to get this corrected.”

The Dolphins were a respectable 5-for-12 on third down conversions, but they were 3-for-9 at one point.

Jacksonville held Miami to six snaps in the first quarter. The Dolphins’ offense had three first downs and 56 yards in the first half.

They fixed things in the second half, scoring 17 points, but they were fortunate they were playing the Jaguars (1-7) and not one of their tough November opponents — San Diego (5-3), Detroit (6-2), Buffalo (5-3) and Denver (6-1).

Miami is averaging 24.9 points per game, which is 12th in the NFL. But take away the three defensive touchdowns and the safety and the Dolphins’ offense is averaging 22 points, which would rank 22nd.

Philbin didn’t mind that the offensive players weren’t satisfied after the Jacksonville games.

“Some wise man said, ‘Dissatisfaction is the basis of all progress,'” Philbin said. “Yeah, I think it’s good. Again, it’s not easy to win. I told the team there’s no need to apologize for the game. The game is the game. It stands on its own. That’s what we did for 60 minutes. It’s on tape. We made some plays when we had to.”

NOTES: DE Cam Wake had a sack against Jacksonville and now has 5.5 for the season. Wake’s three forced fumbles are tied for the NFL lead, and he seems headed for another Pro Bowl appearance. … SS Louis Delmas had an 81-yard INT return for a TD against Jacksonville and a fumble recovery. … CB Brent Grimes had a 22-yard INT return for a TD against Jacksonville. He has two interceptions this year.

REPORT CARD VS. JAGUARS

–PASSING OFFENSE: C — QB Ryan Tannehill wasn’t sharp. He had four passes batted down at the line of scrimmage, one of which turned into an interception in the end zone. The pass protection allowed three sacks. They got it together later, but it wasn’t a productive day.

–RUSHING OFFENSE: B-plus — RB Lamar Miller continues to impress. Miami rushed for 148 yards and averaged 6.2 yards per carry. Tannehill and Miller each had a 30-yard carry. They didn’t do much in the first half (26 yards) but they found their game.

–PASS DEFENSE: A — Miami totaled four sacks and two interceptions that were returned for touchdowns. They kept Jaguars QB Blake Bortles off balance all day. While they gave up a 48-yard reception and two others of more than 20 yards, they did a good job.

–RUSH DEFENSE: C — Miami wasn’t bad, but it gave up 176 yards, 73 of those coming on a pair of runs. All yardage counts, so overall it was a shaky showing. But the Dolphins tackled well — even without MLB Koa Misi (ankle).

–SPECIAL TEAMS: B — This was a big area of improvement. P Brandon Fields was solid, the return game was strong, K Caleb Sturgis was reliable (two field goals) and the coverage units were good. There was a hiccup here and there, but overall it was solid.

–COACHING: C-plus — Another slow start. The Dolphins led just 10-3 at halftime. And they couldn’t figure out Jacksonville’s hurry-up offense in the first half. Credit the coaches for making halftime adjustments, if that’s what happened, and getting things going in the second half. But that first half was ugly.