The Mets are losing Pete Alonso to the Orioles, who are signing him to a five-year deal worth $155 million, per multiple reports. There are no opt-outs in the contract.
The move comes a day after the Mets lost Edwin Diaz to the Dodgers on a three-year deal worth $69 million.
With Alonso and Diaz gone, they join former franchise cornerstone Brandon Nimmo as ex-Mets.
Nimmo was traded to the Rangers earlier this offseason for Marcus Semien.
The Mets had reportedly been unwilling to go beyond three years for Alonso, who gets the long-term deal he desired and couldn't get last offseason, when he returned to the Mets on a two-year deal that contained an option after the first season -- which he exercised upon the completion of the 2025 campaign.
With Alonso gone, the Mets have a massive hole to fill in a lineup that has already downgraded this offseason by dealing Nimmo for Semien.
Alonso served as vital protection for Juan Soto last season, with the burly right-hander slashing .272/.347/.524 with 38 home runs, a career-high 41 doubles, and 126 RBI.
During his seven-year career in New York, Alonso -- who broke the Mets' all-time home run record last season -- hit .253/.341/.516 with 264 home runs, 183 doubles, and 712 RBI over 1,008 games.
Like Diaz, Alonso had repeatedly expressed a desire to stay.
But the Mets, under head of baseball operations David Stearns, are going in a different direction.
It is unclear how the Mets will attempt to fill the power void left by Alonso's departure.
They made a run at Kyle Schwarber, but he re-signed on a five-year deal with the Phillies on Tuesday.
The two biggest names remaining on the free agent market are Kyle Tucker and Cody Bellinger, but neither possess anything close to the game-changing power Alonso has. And they're both left-handed hitters.
Another option on the free agent market is Eugenio Suarez, who blasted 49 home runs last season. Suarez, a third baseman, could theoretically be used as a designated hitter.
When it comes to free agent first baseman, the Mets could conceivably turn to Japanese stars Munetaka Murakami or Kazuma Okamoto. Murakami has huge power but tons of swing and miss in his game, and is viewed as a poor defender. Okamoto is a strong defender, but does not provide nearly as much power potential as Okamoto.
The Mets' main in-house first base option is Mark Vientos, who is coming off a down offensive season and is relatively untested at the position.