FOXBOROUGH, Mass.

As Isaiah Wynn hobbled off the field on the ninth snap of his New England Patriots career, it became clear that he, like so many other of the team’s top draft picks, would not be making an immediate impact.

The Patriots selected 11 players in the top three rounds from 2014-17. Two of them, Joe Thuney and Malcom Brown, developed into starters. The other nine combined to start 15 games.

The defensive players in particular — Jordan Richards, Geneo Grissom, Cyrus Jones and Vincent Valentine – have contributed little. Injuries, of course, are a factor. Cyrus Jones, Valentine and Derek Rivers have spent more Sundays on injured reserve than on the 46-man game-day roster.

Wynn, who reportedly suffered a torn Achilles last Thursday, is about to join that list.

Offensive tackle Antonio Garcia, selected in the third round in 2017, was released in the spring after missing his rookie season with a medical condition.

The top of the draft has been borderline disastrous, partially due to factors out of the Patriots’ control.

But it prompts the question: How long can this keep up without it affecting the Pats?

“Who is their core?” asked NFL Network analyst Daniel Jeremiah, who specializes in draft coverage. “Who is their young core that you’re going to build around going into the future? The crazy thing is, you look at (Jacoby) Brissett and (Jimmy) Garoppolo, obviously could have been the captain of that ship in terms of core … But they don’t have that.”

As the Pats perennially steamroll to 12-4, they continue to cover up for misses at the top of the draft.

A few reasons: They’ve been incredibly savvy in the middle rounds, grabbing James White, Trey Flowers, Shaq Mason and Deatrich Wise with fourth-round picks over the past five drafts.

Consider the 2015 fourth round that netted Flowers and Mason: More than half the players selected in that round — 21 of 37 — were released before the end of their rookie contracts. About one-quarter of the players carved out roles as spot starters/backups.

Only a handful are high-level contributors, including Tampa Bay linebacker Kwon Alexander, Carolina offensive tackle Daryl Williams, Mason and Flowers.

From the 2014 fourth round, White is one of the nine players who remains with the team that selected him.

“Honestly, it’s a good exercise when you’re grading teams and how they drafted, sometimes it’s good to just take the rounds off and just put the players alphabetically,” Jeremiah said. “If you put the players with no rounds, it might make (the Patriots) feel a little bit better about themselves.”

Because they’re not consistently landing starters near the top of the draft, the Pats have turned to free agency to find stopgap options. There’s been an unusual amount of veteran turnover with the Pats, as Jeremiah noted, and that’s due to the nature of the contracts they’re signing.

“I feel as if the Patriots do sign a good deal of veterans, but I think they mitigate any salary-cap issues by going cheap,” said salary-cap expert Jason Fitzgerald, who coauthored the book “Crunching Numbers: An Inside Look at the Salary Cap and Negotiating Player Contracts.”

“Jordan Matthews is a great example of a low risk/ high-reward player. Even though Matthews was cut he wasn’t expensive and had he made the team would have been a cheap option that probably would have produced in the offense. His role is now being filled by (Eric) Decker, another cheap option. So it’s not as if they are going into free agency and having to fill spots with $4 to $6 million per year players that have two-and-three-year contracts. They fill a receiver void with a $2 million investment for a year, maybe a defensive end like Chris Long a few years back for $2.5 million.

“I think this is different than other teams that have to fill out rosters with either the lowest-level veterans on minimum salary contracts or damage their future cap by looking for longer-term answers that get more expensive. That’s really the way in which they are mitigating the risk of the draft.”

But that game can only last so long. Those signings are cheap for a reason. The players are complementary pieces, not cornerstones.

“That Super Bowl, as good as Brady is to almost pull that thing out, when you look at just the number of blue-chip caliber players that could start for any team in the league,” Jeremiah said, “it was severely lopsided in favor of the Eagles.”