MINNEAPOLIS -- The Mets’ fears regarding Jose Siri's left leg were realized on Monday, when an MRI revealed a fracture in his tibia. The team does not yet have a clear timeline on how long Siri will be sidelined, manager Carlos Mendoza said, “but he’s going to be out for a while.”

“That sucks for Siri,” fellow outfielder Tyrone Taylor said. “I know he just wants to be out there with the guys. I wish him a speedy recovery.”

Siri fractured his tibia by fouling a ball off his shin in Saturday’s 3-1 loss to the Athletics. Although initial X-rays came back negative, that technology sometimes misses smaller breaks. Two days later, an MRI revealed the fracture.

“It’s obviously disappointing whenever something like that happens,” Siri said.

An offseason trade acquisition from the Rays, Siri was just 1-for-20 at the time of his injury, but he had impacted multiple games with his defense and his aggressive baserunning.

In Siri’s absence, Taylor figures to become the main starter in center, as he has been at various points during his year-plus with the Mets. He’s also off to a slow start, batting .158 with a .390 OPS.

“I’m thankful for any opportunity that I get,” Taylor said. “I don’t know what’s going to happen now, but yeah, I’ll be thankful for any opportunity that I get.”

The Mets will make a move Tuesday to supplement the roster, with José Azocar and Gilberto Celestino standing out as the obvious suspects at Triple-A Syracuse. But they also have two notable options already on the Major League roster. Brandon Nimmo, a longtime center fielder who moved to left last year, is still capable of starting games in center if the Mets have a need there. Mendoza has also instructed No. 7 prospect Luisangel Acuña to be ready.

Thus far, Acuña has served the Mets exclusively as a middle infielder, but he played center regularly last year, both in Syracuse and in the Venezuelan Winter League. Before games, Acuña regularly shags fly balls to stay sharp. He’s also starting to pick things up at the plate, going 2-for-3 with a walk and a stolen base in Monday’s 5-1 win over the Twins to extend his hitting streak to four. The rookie is batting .429 over that stretch.

“Hopefully Siri is able to come back soon,” Acuña said through an interpreter. “But Mendy told me at any given moment, to just be ready. If they need me out in center field, they’ll put me out in center field. So it’s my job to be prepared for any situation.”

As for Siri, the Mets plan to send him for follow-up testing in one week to see how much healing has occurred. In the interim, he will remain on crutches. Siri hopes to have a better idea of his timeline once that additional testing occurs.

“I’m a quick healer,” he said.