The Post’s Jon Heyman previews the NL East:

O/U wins: 101.5

Key player: Ronald Acuña Jr. Who else? The reigning NL MVP became the first player to go 40-70 (40 homers, 70 steals) last year, so this is one guy with truly no limitations. The only (very small) question is the health of his knee since he did need to make a visit this spring to see noted surgeon Dr. Neal ElAttrache. He was given a clean bill of health (it was only meniscus irritation), which was great news not only for the Braves but for all of baseball because this guy is something to behold. Truly a magical player (unless you’re on one of the other NL East teams).

Player who’ll need to step up: Jarred Kelenic. He needs to step up, not for the Braves but for himself. The Braves will be fine no matter how Kelenic does, especially now that they have the underrated Adam Duvall back in the fold to share left field with him. The prospect-list makers and hopeful fans have always loved this guy, but sorry, the Mets don’t look so dumb now for trading him for Edwin Diaz (even though it meant taking Robinson Cano’s contract). Kelenic needs to become more consistent and stop hitting walls in anger to fulfill the early guesses about his career.

Name you’ll get to know: AJ Smith-Shawver. Well, it’s actually two names. Anyway, Smith-Shawver should be up again at some point after not making the Braves out of spring. After a quick rise through the minors, he became the youngest Brave since Steve Avery in 1990 to win a game last year when he beat the Rockies at age 20. Since a rare small Braves question is rotation depth, expect the seventh-rounder to contribute this year.

Biggest question mark: Rotation health. Like the rest of this team, the rotation is extremely talented. However, there have been health questions about ace Max Fried and one-time star Chris Sale, two of the better lefties in the game if sound, and let’s face it, Charlie Morton is 40 years old. This is a terrific team, but their rotation depth is only average, especially if Reynaldo Lopez, the longtime White Sox setup man, is in the bullpen.

How it’ll go down: It’s hard to see it going down any way but very well for the Braves who are shooting for their seventh straight division title, which would get them halfway to their incredible 14 straight in the Maddux-Glavine-Smoltz era. Acuña is the top player but Matt Olson, Austin Riley, Ozzie Albies, Sean Murphy and Michael Harris II help make it the best lineup in the game. The Phillies are the only ones with a shot to unseat them in the NL East, and while that seems unlikely, Philly has proved dangerous in October, knocking out its main rival the last two years. Believe me, the Braves haven’t forgotten.

O/U wins: 89.5

Key player: Bryce Harper. He was featured on a Sports Illustrated cover at age 15 (back when Sports Illustrated was a thing), and he’s outdone even the outsized schoolboy expectations. Harper is not only one of the very best and most clutch players in the game, he’s helped form the contending team by serving as its main recruiter, not just its best player and spiritual leader. Philly turned out to be the perfect sports-crazed town for him even if the ex-Nat couldn’t have imagined that would be the case.

Player who’ll need to step up: Taijuan Walker. He wasn’t a major postseason factor after signing a $72 million free-agent deal the prior winter. The top of the Phillies’ rotation remains among the best in the game with ace Zack Wheeler extended for $126 million over three years, Aaron Nola back on a $172 million, seven-year deal and Ranger Suarez one of the more underrated starters in the game in the No. 3 spot. Wheeler and Nola eat up a lot of innings but it would be nice if Walker could make enough of an impact to take some postseason starts. He was suffering from shoulder stiffness at the end of camp.

Name you’ll get to know: Cristopher Sanchez. At 27, he looks like a classic late bloomer and appears ready to take a step forward as the Phillies’ No. 5 starter after a solid 2023 season in which he posted a 3.44 ERA. He could take on an even bigger role if Walker falters, too. The slight lefty showed nice stuff last year, striking out a batter an inning. He rounds out a very nice rotation.

Biggest question mark: The bullpen. Isn’t it always the pen? Jose Alvarado presumably will do a lot of the closing even though there’s no set closer, which is unusual for a big-market team. Craig Kimbrel faltered last year at the end and they haven’t really fortified that spot. But with Seranthony Dominguez and Gregory Soto plus a rejuvenated Jeff Hoffman, who was a revelation in 2023, and youngster Orion Kerkering, they have plenty of closing candidates and an overall solid pen, just no set closer.

How it’ll go down: This is a stacked team intent on making another nice playoff run. While the Phillies have a shot to knock off the Braves in the division, it’s been in October when this team has really shined the past two seasons. A deep lineup, clutch players and a top of the rotation to match anyone will continue to make this team a threat. Hard to see how they don’t at least make the postseason, which seems to be their time.

O/U wins: 81.5

Key player: Pete Alonso. This is the star slugger’s walk year, and Mets fans are hoping and praying the team from Queens can keep him. He’s hired Scott Boras as his agent, raising the concern level among fans (and the Cubs don’t have an established star at first and are known to like Alonso). In any case, the pressure is on Alonso to produce, not only because this is his platform year but also because the Mets look like a borderline playoff team in a top-heavy National League. (After the Dodgers, Braves and Phillies, they should be able to compete with anyone.)

Player who’ll need to step up: Brett Baty. Fans were clamoring for Baty to be called up last year and he wound up having a largely disappointing rookie season despite all the early accolades. He’s obviously still young enough to envision stark improvement, but an uneven spring didn’t allay team concerns. The Mets passed on Matt Chapman and couldn’t offer J.D. Davis the full-time job at third base because they want to give Baty a full chance to prove he can handle the position that’s given the Mets fits for most of their 62 seasons (David Wright was the exception).

Name you’ll get to know: Drew Gilbert. One of the two outfield prospects who came in the Justin Verlander trade, Gilbert is a Lenny Dykstra type, according to our Mets writer Mike Puma (he meant that in a good way). He has very good speed and just enough pop to be dangerous. He will begin the year at Triple-A Syracuse but should make an appearance with the big club at some point.

Biggest question mark: The rotation. The spring shoulder injury to ace Kodai Senga left the Mets without an obvious Opening Day starter (Jose Quintana will take the ball) and added real concern about the bottom of the rotation. There are a decent number of candidates to fill out the group, but none is a certainty. Sean Manaea, Luis Severino and Adrian Houser will comprise the middle of the rotation, with Tylor Megill, Jose Butto, Joey Lucchesi, rehabbing David Peterson and a few kids also likely to get chances throughout a year of starting pitching questions.

How it’ll go down: They could be a playoff team as Mets baseball president David Stearns predicted to The Post before Senga went down, or they could repeat as NL East also-ran. The guess here is they will be somewhere in the middle of that, and somewhere in the middle of the standings. They look like a third-place team in this division as they prep for what promises to be their really big year — 2025.

O/U wins: 78.5

Key player: Luis Arraez. He made a fun early run at the .400 mark last year but while Arraez didn’t come close to the magical number he did make it two straight batting titles, one in each league. He has probably the best bat-to-ball skills in the game, which is exactly what the Marlins have been unable to develop and why he came in trade from the Twins for one of their many talented pitchers (Pablo Lopez).

Player who’ll need to step up: Tim Anderson. He is a former batting title winner who was one of the worst hitters in the game last year, so this could go either way. He had switched to second base, so now he switches back to shortstop, where he previously thrived. The Marlins got him at a seemingly bargain rate of $5 million, but it’s no bargain if he doesn’t put 2023 behind him.

Name you’ll get to know: AJ Puk. The Marlins know how to develop pitchers, and that includes even pitchers acquired in trade. Puk, who came from Oakland for OF JJ Bleday, looks like the potential star he was pegged to be when the A’s made him the sixth-overall pick in the 2016 draft. Puk, now 28, had a nice year in relief last year when he whiffed 12.4 batters per nine innings, but looks ready to take his turn now in the rotation. Ryan Weathers, a former first-rounder from the Padres, and Max Meyer, who the Marlins tabbed with the No. 3 overall pick in 2020, look ready to contribute as well.

Biggest question mark: The offense. The Marlins are great at developing pitchers, so figure they will be all right there. Hitting has been the issue forever as the organization has failed to develop any. Former GM Kim Ng did a nice job making trades to acquire hitters, and Jake Burger and Josh Bell did well after being acquired. A full year of Jazz Chisholm Jr. will help, but they’ve lost Jorge Soler as they continue not to spend, and it’s unclear how they can compete at the top of the NL East in terms of firepower.

How it’ll go down: They pulled off a seeming miracle behind first-year manager Skip Schumaker last year by beating out MLB’s most expensive team (the Mets) and getting into the playoffs despite a wildly negative run differential (-66). It’s hard to see how they made it last year much less how they are better this year. It feels suspiciously like they are crossing their fingers that Schumaker can make it two straight miracles.

O/U wins: 66.5

Key player: CJ Abrams. He showed the big potential that was originally predicted for him by hitting 18 home runs, stealing 47 bases and playing sometimes spectacular defense at shortstop, and there’s reason to expect even more in his second full season. After an uneven start with the Padres, he wasn’t seen by most as the top player in the Juan Soto trade, but he may well turn out to be. Looks like a future superstar.

Player who’ll need to step up: Keibert Ruiz. Washington signed him to a $50 million, eight-year extension, and his defense took an unexpected turn for the worse last season when there were framing and throwing questions (throwing got tougher for everyone thanks to the new rules). They were expecting Ruiz to be a star, and they will need him to be just that, especially with a young staff. He still has it in him.

Name you’ll get to know: Lane Thomas. Folks should probably know the player that already is a 20-20 guy (28 homers, 20 steals). But he wasn’t so heralded as a prospect and he played for a young, anonymous, rebuilding team last year. That doesn’t mean he doesn’t have star potential because he does, and he probably should have been an All-Star last year. The outfielder who came in a deadline deal from the Cardinals three years ago for Jon Lester is one of the most overlooked and underrated players in the division, if not all of baseball.

Biggest question mark: Power. They need to hit some home runs, which explains the decision to sign Joey Gallo (remember him?) and Eddie Rosario, who both have something to prove. Gallo’s career has taken a turn for the worse and Rosario’s free agency didn’t turn out as he’d like, as he had to take a minor league deal after a decent season. Nick Senzel is another who has a chance to resurrect his career, and young ballyhooed prospect James Wood, who’s frequently cited as a Willie McCovey type, is seen as a future star.

How it’ll go down: Not well this year. But the Soto trade has given them a nice chance to rebuild sooner rather than later. GM Mike Rizzo is known as a great scout, and it appears they may get multiple stars out of that Soto trade. MacKenzie Gore looks like he has ace potential, and Abrams and Wood look like future All-Stars. The Nats don’t have much of a present but a very decent future.