The offseason has yet to officially begin, but Pete Alonso already made up his mind about what he wants to do this winter.

The Mets first baseman told reporters minutes after New York’s season-finale loss he was going to opt out of his contract and become a free agent.

“I’ve really appreciated it and have been nothing but full of gratitude every single day. Nothing is guaranteed, but we’ll see what happens,” Alonso said . “I’ve loved being a Met. Hopefully, they’ve appreciated me the same.”

Alonso has been linked to the Red Sox previously, and he’d still be a good fit for Boston if it wanted to pursue him.

In July, The New York Post’s Jon Heyman wrote that even before Triston Casas suffered a season-ending knee injury , the Red Sox “ didn’t seem sold ” on him and dubbed Alo

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