The Boston Red Sox face critical decisions as they seek to regain health and fill key positions. Notably, Kristian Campbell taking first base reps could pave the way for top prospect Marcelo Mayer's promotion to the majors. Campbell's emergence allows Mayer, traditionally a shortstop, to transition to second base, where he has shown promise during minor league play. While Mayer has demonstrated athleticism and adaptability, transitioning positions may present challenges. The Red Sox need to act quickly to secure Mayer's big league at-bats, leveraging his potential to strengthen the roster.