Casas is a development piece whose role could shift as Alonso arrives; the plan hinges on his continued growth as a versatile piece.

Casas’ injury creates a first-base/DH vacancy in Boston, boosting urgency for a veteran upgrade like Díaz to stabilize the lineup and drive immediate run production.

Casas is referenced as the player a temporary replacement could be sought for, illustrating the ongoing shifts in Boston’s lineup and the broader context of the team’s offense around Narváez.

Casas’ injury left a vacancy at 1B that Lowe is expected to fill, potentially delaying Casas’ return to full duties but preserving his long‐term upside. Casas’ absence created the opening Lowe now seeks to fill, with both players shaping BOS’s 1B landscape down the stretch.

Casas’ knee injury created the 1B vacancy Lowe steps into; Casas is out for the season, and Casas’ recovery will shape how the Sox phase Lowe and other depth pieces into the lineup moving forward.