Pete Alonso’s long free agency has taken him almost to February without a new deal and it certainly seems like rejecting the seven-year, $158 million extension the Mets offered the first baseman in 2023, as first reported by The Post’s Joel Sherman, was a costly mistake.

But all is not necessarily lost for Alonso, who turned 30 in December and so far has struck out on a new deal after a disappointing regular season that saw his production at the plate drop off for a second straight year.

Another Scott Boras client, Matt Chapman, found himself still without a job all the way until March last offseason, as the third baseman had seen his offense slip a bit in 2023 — and more than a bit from his 2019 breakout season.

With not much of an obvious market, Chapman ended up signing a three-year, $54 million deal to join the Giants after entering the offseason with some expectations of a deal for twice as long and nearly three times as lucrative.