Willson Contreras hits mammoth three-run homer in Red Sox win

But when Willson Contreras, the team’s current slugger, got all of one, the revved-up Friday night crowd of 37,007 erupted with a universal feeling of joy.

This moonshot — the signature moment as the Red Sox downed the Giants, 6-4 — didn’t leave anyone at the ballpark in suspense.

Before the baseball had even finished its flight way over the Green Monster and to some destination on or…