The Boston Red Sox had to know when the offseason began that there was a chance they'd lose Alex Bregman in free agency. One would then think that they came up with a list of alternatives at the beginning of the offseason. If they had done such a thing, they'd have clearly seen that Eugenio Suárez was always the next best option at third base.
After all, the Red Sox reportedly inquired about Suárez at last year's trade deadline (with the intention of playing him at first base), meaning they've already envisioned how Geno's right-handed power bat would play in the haven known as Fenway Park.