Red Sox Prospect Marcelo Mayer Makes MLB Debut Following Bregman Injury

The Boston Red Sox called up top prospect Marcelo Mayer for his Major League debut on May 24, 2025, following an injury to third baseman Alex Bregman, who was placed on the injured list with a severe quadriceps strain. Mayer's debut at Fenway Park was met with a standing ovation from fans, though he struggled at the plate, going 0-for-4 with three strikeouts in a 2-1 loss to the Baltimore Orioles. Despite the rough offensive start, Mayer's defensive plays were noted, including a key assist on the first put-out of his career, supported by first baseman Nick Sogard. Mayer expressed excitement and gratitude for the experience, calling it a day he will never forget and acknowledging the support he received from teammates and fans. The promotion of Mayer, along with fellow prospect Kristian Campbell, highlights the Red Sox's reliance on young talent amid injury challenges. Mayer's journey to the majors included a hectic day with last-minute travel from Triple-A Worcester, underscoring the suddenness of his call-up.