White Sox get Luis Castillo in four-player trade

Key Points:

• The Mariners have traded starting pitcher Luis Castillo to the Chicago White Sox in exchange for reliever Seranthony Dominguez, outfielder Nolan Jones, and prospect Boston Smith, with Chicago assuming Castillo’s $22.75 million contract for the next two years plus a 2028 option.
• Despite rumors of trading other starters like Emerson Hancock and George Kirby, it is Castillo who is moving, though Kirby remains available and could be traded before the deadline; Seattle is actively listening to offers for both Hancock and Castillo.
• Top pitching prospect Kade Anderson is close to MLB promotion and could fill an open rotation spot after the Mariners trade one or more current starters, with Anderson showing dominant performance at Double-A Arkansas this season.
• Castillo’s recent performances have been mixed, with struggles including high ERAs around 4.85 to 5.06, multiple home runs allowed, and a losing record, though he has had some quality starts and strikeout success in certain outings.
• The Mariners’ pitching rotation is in flux, with Castillo’s departure and potential trades of other starters creating opportunities for younger pitchers, while Castillo looks to regain form with the White Sox.