- The White Sox made a big deadline move, acquiring veteran starter Luis Castillo from the Mariners as they lean into a World Series window.
- Chicago sent reliever Seranthony Domínguez, outfielder Nolan Jones and catching prospect Boston Smith to Seattle in the deal.
- The Sox are AL Central leaders at 58-52, and Castillo has a 5.06 ERA in 99 2/3 innings this season.
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