The Boston Red Sox are calling up infielder Marcelo Mayer, the No. 6 prospect in baseball and a central part of their future who they hope can play a role in their push for a postseason berth this year, sources told ESPN.
The 22-year-old Mayer, who has excelled at shortstop as he ascended through the Red Sox's farm system after they took him with the No. 4 overall pick in the 2021 draft, is likely to get playing time with All-Star third baseman Alex Bregman expected to land on the injured list after leaving Friday's game with right quadriceps tightness.