The Boston Red Sox's signing of Isiah Kiner-Falefa certainly registered as unimpressive when it was announced, and for good reason.
With all due respect to the 30-year-old utility man, he simply doesn't have the hitting prowess to fill the team's wide-open hole at second base with any sense of regularity. Kiner-Falefa can run well and does a good job of putting his bat on the ball, but he almost never walks and his career high in wRC+ is 93. A suitable Alex Bregman replacement he is not.
However, he's a strong defender who has ample experience at every position on the diamond except for first base, including 586 innings at catcher from 2018-19.