ATLANTA -- About two and a half hours prior to first pitch on Tuesday, the Mets congregated in the SunTrust Park visiting clubhouse for a team meeting. This was a different sort of meeting, weightier than manager Mickey Callaway’s usual pep talks. The Mets scheduled it hours in advance, taking players away from their usual routines of batting practice, stretching and catch to gather together in one big room.

What exactly went on is unclear; afterward, Mets players were tight-lipped about the meeting, describing it only in general terms as positive and productive. It’s also too easy to draw a cause-and-effect between it and the 10-2 win over the Braves that followed. The more obvious reason for the Mets’ success was the pairing of starting pitcher Jacob deGrom and first baseman Pete Alonso, who dominated the game nearly from start to finish.

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deGrom was electric, hitting 100 mph on the radar gun, striking out 10 and pitching into the ninth. Alonso was dynamic, reaching base in all six of his plate appearances, and finishing 4-for-4 with a two-run homer, two doubles and three RBIs.

If that was all because of a meeting, the Mets will take it.

“We need every win we can get,” deGrom said.

What the Mets readily admitted was that something had to change. A day earlier, after his Mets dropped their fourth game in five days, Callaway broke from his usual routine of placing positive spin on every shortcoming in discussing the loss: “We just stunk,” he said.

The following morning, he scheduled his meeting, telling all his players to be in the clubhouse at 5 p.m. In the meantime, Callaway and the Mets’ front office worked on a bullpen shakeup, adding rookie Stephen Nogosek and left-hander Daniel Zamora, while placing Jeurys Familia on the injured list and jettisoning Drew Gagnon to Triple-A Syracuse.

deGrom made sure those moves wouldn’t factor into Tuesday’s game, holding the Braves to three hits -- a double, a bloop single and an infield chopper -- over his first eight innings. It was not until the ninth that the reigning National League Cy Young Award winner cracked, allowing back-to-back homers to Freddie Freeman and Josh Donaldson to end his night.

“He stepped up when his team needed it the most,” Callaway said. “He did what an ace does.”

“That was Jacob deGrom to a T right there,” added Freeman. “In my opinion, he’s the best pitcher in baseball. He did it tonight again.”

At that point, Callaway brought one of his most trusted relievers, Robert Gsellman, into an eight-run game instead of Nogosek or a lesser arm, saying he feared deGrom would leave inherited runners on base and he did not want those runs to go on his ace’s line.

Certainly, the Mets were at little risk of losing the game. They had gone ahead for good on Alonso’s third-inning double, which keyed a four-run rally against Braves starter Julio Teheran, and had put the game all but out of reach on the rookie’s two-run homer -- his 24th -- in the fourth. Alonso became the second player since at least 2015 to crush at least three extra-base hits at least 108 mph off the bat in the same game, completing the trick before the game was halfway done.

It all made for a banner day for the Mets, though they’ve had big meetings and breezy victories before. Following his own private meeting with general manager Brodie Van Wagenen and chief operating officer Jeff Wilpon in mid-May, Callaway cautioned that a response of one or two isolated victories would not be enough. The Mets needed to string together weeks’ worth of solid play -- something they proved unable to do in the month that followed.

Now, the Mets have another chance, with a rubber game in Atlanta on Wednesday and eight more against the Cubs and Phillies before this road trip is complete. It’s the type of diabolical trip that can break them if they don’t play well. It’s also the type that can spur them to better things, while there’s still time enough for that to happen.

“Yeah, there’s been times when there’s been down, but … we’re not going to fold,” Alonso said. “We’re just going to keep grinding away at this. We still have a lot of ball left.”