Watch: Drayer breaks down Mariners’ Luis Castillo trade

The Seattle Mariners traded veteran starting pitcher Luis Castillo to the Chicago White Sox on Saturday in exchange for reliever Seranthony Domínguez, outfielder Nolan Jones, catching prospect Boston Smith and cash considerations.

The deal marked the end of Castillo’s decorated tenure in Seattle, which included two playoff appearances and an All-Star berth over a stint that spanned five seasons.

Seattle Sports Mariners insider Shannon Drayer broke down what the Mariners received in the trade and the impact Castillo had on this era of Mariners baseball. See Drayer’s analysis in the video at the top of this post or the embeded video below.

The #Mariners have traded Luis Castillo to the White Sox for a return including reliever Seranthony Domínguez. @shannondrayer breaks down the move and touches on the impact Castillo had on this era of Mariners baseball. https://t.co/eyDcF0FgjT pic.twitter.com/H8lcehgG92

— Seattle Sports (@SeattleSports) August 2, 2026

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