"That's devastating," Mickey Callaway said. "We just don't know what's next. So we have to fill in for him. We have to have somebody step up, and I feel like they will."

As the Mets try to continue their recent string of success, they’ll have to do it without Robinson Cano.

The team announced after an MRI that the second baseman suffered a left hamstring tear in Sunday’s 13-2 win over the Pirates. He was placed on the injured list Monday before the Mets’ doubleheader at Citi Field.

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“That’s devastating,” Mickey Callaway said. “We just don’t know what’s next. So we have to fill in for him. We have to have somebody step up, and I feel like they will.”

Callaway said there is no timetable for Cano’s return, but the team said surgery won’t be required.

In the fourth inning Sunday, Cano pulled up after rounding first on what looked like his third double of the contest. He was tagged out between first and second, walked slowly back to the dugout and was replaced at second base by Jeff McNeil.

“He just kind of hesitated at first, didn’t know if he wanted to go, decided to go,” Callaway said.

Cano, 36, already has had two stints on the injured list this season because of a strained left quadriceps, though Callaway doesn’t believe the current injury is related.

McNeil again replaced Cano at second in the opening game of the doubleheader. He went 2-for-5 with a leadoff home run in a 6-2 win over the Marlins.

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Luis Guillorme was called up from Triple-A Syracuse, where he was hitting .307 in 69 games. He played second base in the nightcap Monday and, after going 0-for-4, is hitting .154 with the Mets.

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Callaway said he likes Guillorme’s ability to “put together a pretty good at-bat.”

“Luis has been performing really well based on our feedback from the Triple-A coaching staff,” Callaway said. “We felt like he was the best fit at this point.’’

There had been speculation that the Mets might bring in infielder Asdrubal Cabrera, 33, who played for them the previous three years. He was released by the Rangers last week after compiling a .235/.318/.393 slash line. Cabrera reportedly signed with the Nationals late Monday.

After ending a career-worst 0-for-23 slump, Cano had gone 10-for-17 leading up to the injury, including four straight multihit games and five extra-base hits. He was 3-for-3 Sunday.

Cano has four years and $96 million left on his contract after this season.

Notes & quotes: Noah Syndergaard was named National League player of the week after allowing one earned run in 14 1⁄3 innings in two starts . . . The Sept. 15 home contest against the Dodgers has been moved to 7 p.m. so it can be the ESPN Sunday night game.

With Anthony Rieber