ATLANTA — Noah Syndergaard’s strained right hamstring was classified as “low-grade” on Monday, leaving the Mets hopeful the right-hander’s absence from the rotation will be limited to one or two starts.

In the meantime, manager Mickey Callaway wasn’t prepared to reveal who will replace Syndergaard in the rotation, but hinted Wilmer Font is a strong possibility for Thursday against the Cubs at Wrigley Field.

Font was sharp out of the bullpen Sunday, when he pitched three shutout innings against the Cardinals.

“It makes him very intriguing,” Callaway said before the Mets lost 12-3 to the Braves at SunTrust Park. “I think the fact he got to throw the number of pitches he threw, kind of stretched out, that definitely puts his name on the radar for that.”

In three starts for the team, Font has pitched to a 7.84 ERA. The fact Syndergaard’s hamstring injury isn’t more severe may prompt team officials to plug in Font rather than promote a pitcher from the minors.

“That probably does make it a little bit easier to take somebody out of your pen and plug the hole in the meantime to see if it’s only one or two starts for sure,” Callaway said.

Other possibilities include righty Chris Mazza, who allowed two hits over eight shutout innings in his last start for Triple-A Syracuse on Saturday. Mazza is 2-3 with a 3.14 ERA in seven starts this season for Syracuse.

Brandon Nimmo was examined by Dr. Robert Watkins in Los Angeles to receive a second opinion on the herniated disk in his neck. Watkins, a noted orthopedist, treated David Wright as he was managing spinal stenosis.

“The concern level at this point, we just don’t quite know what’s going on, so we don’t have a timeline for that,” Callaway said. “You hope he gets back as quick as possible because he can help our offense.”

Jason Vargas was feeling better a day after leaving his start early with a leg cramp. The lefty is expected to take the ball for his next scheduled start, according to Callaway.

Dominic Smith entered play 19-for-49 (.388) with three homers and a 1.128 OPS over his previous 20 games before walking as a pinch hitter on Monday. Overall, Smith had posted a .348/.448/.562 slash line this season. Now the Mets are searching for ways to get Smith into the lineup, as Jeff McNeil returned to left field Monday after filling in for injured Robinson Cano at second base and then receiving a day off. Callaway has not ruled out the possibility of playing Smith, McNeil and Michael Conforto in the same outfield in some alignment.