As they explore their options at third base, the Mets have checked in on a former Yankee.

David Stearns & Co. have expressed interest in free agent Gio Urshela, a source said.

Although no agreement with Urshela appeared imminent, the Mets seem to be at least considering a veteran infielder in the wake of Ronny Mauricio’s injury.

Stearns had suggested during the Winter Meetings in early December that the Mets’ third base spot would be decided internally among unproven but high-upside prospects in Brett Baty, Mark Vientos and Mauricio.

Mauricio then tore his ACL playing in the Dominican Winter League, which might have ended his season before it began and which might have changed the organization’s thinking.

The Mets also have engaged in discussions with veteran infielder Justin Turner, a source told The Post’s Mike Puma earlier this month.

The 39-year-old Turner is more of a DH bat than a glove at this stage of his career, while the 32-year-old Urshela is a lighter hitter but a better defensive option.

Urshela was in the midst of a solid, if unspectacular, campaign with the Angels last season before a broken pelvis ended his year in mid-June.

He hit .299, but with just two home runs across 62 games, he was more valuable on the defensive side.

The sure-handed fielder played each spot around the diamond and saw the most time at third base, which has been his strongest position throughout his eight-year career.

Urshela did not need surgery on the pelvis and has been playing in the Colombian winter league, a positive sign for his health.

Stearns, in his first months as Mets president of baseball operations, already has signed former Yankee Luis Severino, who has “demonstrated that he’s performed in New York,” Stearns said earlier this offseason.

When announcing new manager (and former Yankees coach) Carlos Mendoza, Stearns said in a statement, “Carlos knows what it takes to lead, especially here in New York.”

If a proven ability to handle the city stage is a top priority, Urshela makes sense.

The Yankees acquired Urshela, then an untested prospect, from the Blue Jays in 2018, and he emerged as an invaluable contributor the following season.

Urshela broke out in 2019, showing a flashy glove while posting an .889 OPS with 21 home runs in 132 games.

Urshela was solid in the shortened 2020 campaign and occasionally sensational in that year’s postseason — his go-ahead grand slam in Game 2 of the wild-card round helped clinch the series in Cleveland — before a quieter (.720 OPS) 2021 season.

He was then sent to the Twins in March 2022 in the trade that brought Josh Donaldson and Isiah Kiner-Falefa to the Yankees.

Urshela spent one season in Minnesota before being flipped to the Angels.

Perhaps working in Urshela’s favor is a longtime friendship with Francisco Lindor, the two coming up through Cleveland’s organization together.

Assuredly working in his favor is a relationship with Mendoza, who had been the Yankees’ quality control/infield coach before serving as bench coach while Urshela played in The Bronx.

Urshela, who made $8.4 million in his final season of arbitration last season, likely would come a bit cheaper than Turner.

Other third basemen on the market include Matt Chapman, Donovan Solano and Evan Longoria.

The Mets also could follow through on their original plan and hope the 24-year-old Baty bounces back after a rough, first prolonged look in the majors or Vientos, who has worked with Lindor this offseason, makes strides defensively and offensively.

Utility man Joey Wendle also could get looks at third.