There’s no mistaking it now — Vontae Davis’ hold on his starting job is in jeopardy.

After working in Davis’ stead with the first string over at last few days, Richard Marshall trotted onto the field with the rest of the starting defense in Saturday’s scrimmage. Davis, conspicuously, did not — although he did work with the first unit when it went with five defensive-back sets.

Perhaps most telling: Marshall, who signed a three-year deal with the Dolphins last spring, claims he did not take a single snap with the backups.

“When I go out there, I’m going to play my game and let everything take care of itself,” Marshall said. “I’m always feeling confident in my game.”

The Fins worked goal-line for the first time this camp, and their first-team short-yardage backfield consisted of Jorvorskie Lane and Daniel Thomas. Lamar Miller got the backup goal-line carries, but was stuffed on both third and fourth downs.

As for the starting offensive line, perhaps it should no longer be considered a source of competition. The same five blockers — from left to right, Jake Long, Richie Incognito, Mike Pouncey, Artis Hicks and Jonathan Martin — have worked together consistently since camp started, Saturday included.

Eric Steinbach worked at left guard — his natural position — with the second team.

Observations

It was a good day for the specialists. Brandon Fields boomed punts of 61 and 57 yards on his first two cracks at it, while Dan Carpenter connected three field goals under 40 yards, although he did miss wide left from 51.

Brian Hartline and Jonas Gray were held out of action. Clyde Gates, who had been limited for much of the last week with a sore hamstring, dressed and participated.

Safety Tyrone Culver dropped a gift-wrapped interception served up by David Garrard.

Safety Anderson Russell can lay lick, as Marcus Thigpen can attest. The two collided on a pass across the middle, to Thigpen’s detriment.

Quotable

“We have about 80 percent of the offense in now, so we can see what we’re kind of good at, and hone it down to what we’re really good at,” said Dolphins tight end Anthony Fasano.

Play of the day

It’s the throw that had Sun Life Stadium buzzing Saturday, Ryan Tannehill’s rolling touchdown to Fasano, good for 26 yards.

Training Camp

The Dolphins are off Sunday, but still have seven remaining training camp practices, all open to the public.

Five of the seven will be held at 8:40 a.m. at the team’s Nova Southeastern University training facility in Davie. Admission and parking are free at all practices.

Practice dates and times

Monday: 8:40 a.m.

Tuesday: 8:40 a.m.

Wednesday: 6:25 p.m.

**Aug. 12: 1:40 p.m.

Aug. 13: 8:40 a.m.

Aug. 14: 8:40 a.m.

Aug. 15: 8:40 a.m.

**Season-ticket holders only