Inside look at three cornerstones who are no longer Mets

The Mets either traded away or lost in free agency three key pieces of the franchise this week.

Pete Alonso

How acquired: Drafted in the second round (No. 64 overall) in 2016 out of the University of Florida.

Tenure with the Mets: 7 seasons

Highlights: It has to start with his famous three-run, go-ahead home run off now-Mets closer Devin Williams in the ninth inning of Game 3 of the 2024 wild-card series, with the Mets down to their final out.

There were the back-to-back Home Run Derby titles in 2019 — as a rookie – and in 2021 (there was no Derby in 2020).

There was his Rookie of the Year and five-time All-Star honors. And there was nightly brilliance, resulting in him becoming the Mets’ all-time home run leader last year.

Oh, and we can’t forget his coining the phrase LFGM for “Let’s f–king go Mets.”

How it ended: After two years of an uncertain long-term future, he opted out of his two-year deal after last season and on Wednesday signed a five-year, $155M deal with the Orioles in free agency. The Mets did not even make an offer, the Post’s Joel Sherman reported.

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Edwin Díaz

How acquired: Acquired from the Mariners along with Robinson Cano in a seven-player trade in 2018, with the Mets most notably giving up the then-heralded prospect Jarred Kelenic.

Tenure with the Mets: Seven seasons, though he missed the entire 2023 season due to injury

Highlights: His entrance to Timmy Trumpet’s “Narco” became one of the most exciting attractions in the sport, and he lived up to it by emerging as perhaps the best — and most electric — closer in MLB.

He overcame a brutal first season with the team — during which the trade was lambasted — to become a fan favorite and two-time All-Star with the team.

Missing the 2023 season after tearing his patellar tendon while celebrating in the World Baseball Classic was a lowlight, though.

How it ended: He opted out of his contract after last season, and on Tuesday signed a three-year, $69M deal with the Dodgers. The Mets, per The Post’s Jon Heyman, offered three years at $66 million.

Brandon Nimmo

How acquired: Drafted in the first round (No. 13 overall) in 2011 out of Cheyenne East High School in Wyoming.

Tenure with the Mets: 10 seasons

Highlights: The constant smile on his face and his habit of sprinting to first base after drawing walks made him popular among fans.

Though he was never an All-Star, it was his day in and day out consistency that made him a valuable commodity — he played over 150 games each of the past four seasons.

His most memorable moment came in Game 161 in the Mets’ magical 2024 season, clubbing a two-run homer against the Braves.

How it ended: The Mets traded him to the Rangers for second baseman Marcus Semien. ­