Luis Castillo Traded to Chicago White Sox

The Seattle Mariners have finalized a trade sending starting pitcher Luis Castillo to the Chicago White Sox. The announcement was made on Saturday, marking the end of Castillo's tenure in Seattle.

Sources indicate that the Mariners acquired three players as part of the package for Castillo. Among the players reportedly heading to Seattle are right-handed reliever Seranthony Dominguez and outfielder Nolan Jones, with another player, Boston Smith, also named in the deal by some reports.

This move represents a significant shift for both franchises. For the White Sox, acquiring a proven starting pitcher like Castillo signals an aggressive push to bolster their rotation. Meanwhile, the Mariners, by trading away their established ace, appear to be retooling and acquiring prospects to build for the future. The exact composition of the return for Castillo, specifically the number of players involved, has been a point of minor variation across reports, with some mentioning a four-player deal while others consistently cite three.