The Boston Red Sox face a dilemma at first base following Triston Casas’ season-ending injury, with Rafael Devers rejecting a position change and urging the front office to find a replacement. Manager Alex Cora suggested promoting from within, but traditional options in Triple-A are underwhelming, leading to speculation about top prospect Marcelo Mayer potentially being shifted from shortstop to first base to bolster the lineup. Given Mayer’s strong performance in Triple-A, the Red Sox may consider this move to enhance their offensive capabilities as they pursue playoff contention.