The Boston Red Sox are still looking for a big bat to anchor their lineup, and trade talks with the St. Louis Cardinals for Nolan Arenado have gained traction. While Arenado would immediately upgrade Boston's infield defense and add a veteran presence, acquiring him would require significant roster adjustments, particularly for Rafael Devers and Triston Casas.
Arenado, an eight-time All-Star, and 10-time Gold Glove winner is one of the best third basemen of his generation.
His defensive prowess alone would be a game-changer for Boston, considering Devers' defensive struggles at the hot corner. Offensively, while Arenado's power numbers have dipped slightly, Fenway Park's hitter-friendly dimensions could help revitalize his production.
If the Red Sox land Arenado, the biggest question is what happens with Devers and Casas.
According to MLB Network's Matt Vasgersian, the most likely scenario would see Devers shifting to first base and Casas into the designated hitter role.
This alignment would create a flexible but powerful infield, giving manager Alex Cora multiple lineup options based on matchups.
Unlike free agent Alex Bregman, Arenado is under contract for three more seasons, making him a more stable investment for a team looking to contend in the short and long term.
However, St. Louis will demand a significant trade package, likely including top prospects or controllable young talent.
Arenado's addition would instantly elevate the Red Sox defense, middle-of-the-order power, and leadership. Still, whether Boston is willing to meet St. Louis' asking price remains to be seen. If a deal is struck, it could be the most considerable Red Sox trade in years, completely reshaping their 2025 infield and postseason chances.
