Marcus Williams played just 27 percent of the Jets’ defensive snaps in 2015, yet the ball-hawking backup cornerback led the team in interceptions with six.

This season, with Antonio Cromartie gone, the 25-year-old undrafted free agent from North Dakota State is working on becoming more than just a replacement.

Buster Skrine likely will start opposite Darrelle Revis at cornerback, but on a team that lined up in some form of nickel defense on over half of its defensive snaps last season, Williams should have frequent chances at outside corner if Skrine takes his usual spot at slot corner in those situations.

“I’ve been working on my press [coverage], working on playing outside a lot more and just getting better at little things — footwork, hand placement and catching the ball as well,” Williams said at the Jets’ recent minicamp.

Considering his previously limited role, the biggest concern surrounding Williams’ potential is that as a backup corner, he mostly covered No. 3 and No. 4 wide receivers. But Williams has an easy answer to those looming questions.

“I just try to keep learning. I think going against guys like Brandon Marshall and [Eric] Decker also helps a lot, too,” Williams said.

This offseason, in the OTAs and at minicamp, Williams has had a chance to go up against these top-tier receivers more frequently, and his position coach has noticed the strides he’s been making.

“Last year in kind of a specialized role he was very productive, a playmaker, very good football intelligence, an easy guy to coach,” said Jets secondary coach Joe Danna. “I think he’s progressed. It looks like he’s made good improvements since last year.”

The Jets won every game in which Williams intercepted a pass — five of the six either secured the victory or ended the opposing team’s best threat. He had two interceptions in the Jets’ 28-23 win over the Jaguars in Week 9, two against the Dolphins — one in the game in London and one at home — and one each against the Browns and Cowboys. He also forced and recovered a fumble in the loss at the Texans.

Williams is hoping to continue to make an impact in a more prominent role in 2016.

“I’m just trying to do my job … and just go out there and make sure I know the game plan and try to do it to the best of my ability,” he said. “And when my number’s called, just go out there and do what they ask.”