The Chicago White Sox have finalized a trade to bolster their pitching rotation by acquiring right-handed starter Luis Castillo from the Seattle Mariners. The move marks a significant roster shift for both organizations as they look toward future competitive goals.

In return for Castillo, the Seattle Mariners are set to receive a package consisting of three players: relief pitcher Seranthony Dominguez, outfielder Nolan Jones, and minor league prospect Boston Smith. The trade involves a mix of established major league talent and developmental assets, suggesting that both teams are attempting to address specific roster needs through this exchange.

While the transaction has been confirmed by reporting, specific details regarding the medical status of the players involved or the internal motivations for the trade—such as salary relief or long-term rebuilding strategies—have not been officially disclosed by either front office. The deal is expected to impact the depth charts for both clubs immediately as the players transition to their new organizations.