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The fact that there is a division title hanging in the balance as the New York Mets and Atlanta Braves meet this weekend might come as a surprise for anyone who was watching the National League East standings earlier this season. What was once a 10.5-game lead for New York in early June and still as large as seven games on Aug. 10 has turned into a down-to-the-wire battle, with both teams chasing 100 wins in one of the best division races of the wild-card era.

But while Mets fans are likely a tad stressed by this stretch run, their star first baseman begs to differ.

“This is fun — this is really, really fun, being in a race like this,” Pete Alonso said Tuesday after a Mets loss and Braves win briefly tied the teams for first place.

Luckily for baseball fans, the two teams square off for one final series this weekend in Atlanta that will start with New York a game up in the standings. Due to the unknown aftereffects of Hurricane Ian, the exact schedule could change, but an improved forecast makes it seem more likely they’ll play all three games this weekend.

Rain delayed or not, the series sets up as the biggest of the 2022 regular season, about as big as you can get in this new 12-team postseason world — and, arguably, the most important regular-season series since at least 2012 (more on that in a minute).

Watch: Mets-Braves on Sunday Night Baseball, 7 ET

Yes, both teams have clinched playoff spots, but given the ramifications of winning the division and receiving a first-round bye compared to having to use your best starters out of the gate in a best-of-three wild-card series — where anything can happen — both teams desperately want to win the division, and which one does will shape the shape the entire MLB postseason.

“The hope is to have a good series against New York this weekend,” Braves outfielder Ronald Acuña Jr. said Tuesday. “The division is on the line.”

One advantage for the Mets: They lead the season series 9-7, so they need to win only one of the three games to clinch the season series, which would give them the tiebreaker edge and the division title if the two teams finish with the same record (tiebreaker games have sadly been eliminated). Both teams have their rotations lined up, with Chris Bassitt, Jacob deGrom and Max Scherzer scheduled to face Max Fried, Kyle Wright and Charlie Morton, although the Braves will be without Rookie of the Year candidate Spencer Strider, who is on the injured list with a strained oblique. The Mets have also are calling up their top prospect, catcher Francisco Alvarez for the series.

Outside of eliminating the risk of having your season end three days into the playoffs, the biggest key in avoiding the wild-card series is what it does to your rotation for the next round — especially since there are fewer off days in this year’s postseason after the schedule was condensed because of the lockout. The best-of-five division series, for example, will be played over a potential six days rather than seven.

Here’s how the Braves playoff rotation lines up if they don’t win the division:

Friday, Oct. 7, WC Game 1: Max Fried

Saturday, Oct. 8, WC Game 2: Kyle Wright

Sunday, Oct. 9, WC Game 3: Charlie Morton

Then if they advance, in the division series:

Tuesday, Oct. 11, NLDS Game 1: Bryce Elder/Jake Odorizzi or Morton

Wednesday, Oct. 12, NLDS Game 2: Fried

Friday, Oct: 14, NLDS Game 3: Wright

Saturday, Oct. 15, NLDS Game 4: Morton or Elder/Odorizzi

Sunday, Oct. 16, NLDS Game 5: Game 1 starter

Now, the Braves are holding out hope that Strider can return in the postseason, although given the nature of oblique injuries, that feels a little ambitious for at least the first couple of rounds. But you can see the impact: If you have to play in the wild-card series, and are fortunate enough to move on, you’re going to end up using your No. 3 or 4 starter twice in the division series if it goes the distance. That’s an even bigger deal for Atlanta if Strider is sidelined and it’s the rookie Elder or the struggling veteran Odorizzi making that extra start instead of Fried.

The Mets have a deep rotation as well, but they would certainly prefer deGrom lined up to start twice in the division series:

Friday, Oct. 7, WC Game 1: Jacob deGrom

Saturday, Oct. 8, WC Game 2: Max Scherzer

Sunday, Oct. 9, WC Game 3: Chris Bassitt

Then in the division series:

Tuesday, Oct. 11, NLDS Game 1: Taijuan Walker/Carlos Carrasco or Bassitt

Wednesday, Oct. 12, NLDS Game 2: deGrom

Friday, Oct: 14, NLDS Game 3: Scherzer

Saturday, Oct. 15, NLDS Game 4: Bassitt or Walker/Carrasco

Sunday, Oct. 16, NLDS Game 5: Game 1 starter

The one caveat here is it’s possible the Game 2 starter could come back and start Game 5 on three days of rest. That’s rarely done these days, however, and even last postseason when Morton broke his leg in Game 1 of the World Series the Braves elected to give starts to Tucker Davidson and Dylan Lee rather than pitch anybody on short rest.

Playing in the Wild Card Series isn’t necessarily a sentence to an early exit. The Nationals won when it was a single game in 2019 — in which they used both Scherzer and Stephen Strasburg — and ended up going all the way. (It did help that the NLCS was a four-game sweep, giving their staff a few extra days of rest heading into the World Series.)

But there’s another incentive to avoiding the wild-card series: which side of the bracket the division runner-up will end up in. The division winner will be the No. 2 seed in the National League and play the St. Louis Cardinals or the third wild-card team (most likely the Philadelphia Phillies or Milwaukee Brewers) in the NLDS. The division runner-up gets the No. 4 seed, would have to play the San Diego Padres (the likely No. 5 seed) in the wild-card round — and then the 107-win (and counting) Los Angeles Dodgers in the NLDS, having just used their top two starters to get there in the first place.

Winning the division also delays starting the clock on the fatigue factor for your pitching staff. While you will hear some mention that the days off between the end of the regular season and the start of the division series can hurt a team — this year, that would be five days — there is no evidence that’s the case. But giving at least your top two starters one fewer start and some extra days off? That sounds like a very good thing in today’s max-effort pitching world.

Look at what happened to the Dodgers last season: They lost that epic NL West race to the San Francisco Giants and started Scherzer in the wild-card game, which meant he couldn’t start again until Game 3 of the NLDS against San Francisco. With the Dodgers down 2-1 in the series, Walker Buehler started Game 4 on short rest and then they used Julio Urias and Scherzer in relief in Game 5.

You can debate some of Dave Roberts’ choices there, but after starting Game 2 of the NLCS against the Braves (two days after his relief appearance) and lasting just 4? innings in a game the Dodgers lost, Scherzer came up with a dead arm and was unable to start Game 6 of the series — which Buehler started again on short rest and pitched poorly as the Dodgers lost and went home.

Bottom line: The less scrambling you have to do with your staff, the better — and, again, this year’s schedule makes it more difficult to do what the Dodgers tried to do last year anyway, which was use their three healthy starters and bullpen their way through the fourth spot in the rotation (or use somebody on short rest).

Which team would benefit more from the bye week, allowing some extra rest for their pitchers? I’d probably say the Mets, given the health issues deGrom and Scherzer have had this season. Plus, deGrom is coming off his worst start since 2019 with the lowly A’s tagging him for five runs in four innings. This is an extremely small sample, but note his ERAs this season:

4 days of rest: 4.15 (three starts)

5 days of rest: 3.52 (four starts)

6+ days of rest: 1.00 (three starts)

Scherzer has good ERAs at all three levels, but check out his OPS and strikeout-to-walk ratio:

4 days of rest: .602 OPS, 4.36 SO-to-BB

5 days of rest: .533 OPS, 8.33 SO-to-BB

6+ days of rest: .460 OPS, 33.0 SO-to-BB

Seems like getting them a little extra rest could be a big deal in how far the Mets go.

So we’re set up for a big series. Now back to my statement of the biggest regular-season series in a decade. I went back to the start of the wild-card game era in 2012 and checked out the tightest division races each full season (no, wild-card races don’t count) and the records heading into the final series those teams played against each other. Here are the closest comparisons.

2022 NL East

New York: 98-58
Atlanta: 97-59

Date: Sept. 30-Oct. 2

2021 NL West

San Francisco: 85-49
Los Angeles: 85-49

Date: Sept. 3-5

An epic race, but the final matchup came early in September — the two didn’t play each other in their final 25 games.

2018 NL Central

Chicago: 83-59
Milwaukee: 82-62

Date: Sept. 10-12

This was the season we ended with two division ties, as the Dodgers and Rockies both finished 91-71 in the NL West. The Brewers won their final eight games (including the tiebreaker) to finally catch the Cubs, but the two clubs last played Sept. 10-12.

2016 AL East

Boston: 85-64
Baltimore: 82-67

Date: Sept. 19-22

The Red Sox were three up on the Orioles when they started a four-game series on Sept. 19. The Red Sox took all four to essentially wrap up the division.

2015 NL Central

St. Louis: 98-58
Pittsburgh: 95-61

Date: Sept. 28-30

St. Louis and Pittsburgh did meet in the next-to-last series of the season. The Cardinals won the first game and then after a rainout they split a doubleheader, clinching the division for St. Louis.

2014 AL Central

Detroit: 84-68
Kansas City: 83-69

Date: Sept. 19-21

The Tigers took the first two games of a three-game series and held on to win the division by one game.

2013 NL Central

Pittsburgh: 81-58
St. Louis: 80-60

Date: Sept. 6-8

The Cardinals swept a three-game series and never relinquished the lead, winning the division by three games.

2012 AL West

Texas: 93-66
Oakland: 91-68

Date: Oct. 1-3

Finally, a series to rival this Mets-Braves matchup — although the two clubs weren’t quite as strong. They met in Oakland for the final series of the season and the A’s took all three games to capture the division.

So there you have it. This Mets-Braves series tracks as the important regular-season series since at least 2012 — and since these teams are better than the A’s and Rangers, it feels even bigger than that one, even if both teams have another series to finish the season.

There are big names and big stars slated to pitch. It involves two of the top franchises in the sport. The implications also go beyond just New York and Atlanta — like, to Los Angeles, where the Dodgers probably aren’t too anxious to face deGrom and Scherzer in a best-of-five series. Alonso is ready. I can’t wait to see how Acuna and Austin Riley and Michael Harris II perform in these big moments. This is baseball at its regular-season best.