Red Sox manager Alex Cora announced that Marcelo Mayer will join the Opening Day roster as the regular second baseman, although he will be protected against left-handed pitchers with veterans Isiah Kiner-Falefa and Andruw Monasterio. Mayer, a former top prospect, struggled in spring training but is expected to develop after a recent injury. In related news, Kristian Campbell has been optioned to Triple-A Worcester after a mixed rookie season, where he excelled initially but faced challenges later on. The Red Sox’s crowded roster raises questions about Campbell’s future role, particularly with several players competing for positions.
