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White Sox trade for Luis Castillo clears path for top pitching prospect

Yahoo Sports • 1 min read • Latest: Aug 2, 2026, 1:30 PM

Last updated Aug 2, 2026

White Sox trade for Luis Castillo clears path for top pitching prospect

Summary

The Chicago White Sox traded reliever Seranthony Domínguez and two minor leaguers to acquire right-handed pitcher Luis Castillo from the Seattle Mariners. This trade opens a vacancy in the bullpen, potentially allowing top prospects Hagen Smith and Tanner McDougal to make their MLB debuts this season. With Domínguez's disappointing performance and salary burden, adding Castillo's experience could benefit the team in a pivotal 2026 playoff push. McDougal, a top prospect with a strong Triple-A record, is considered a likely candidate for promotion soon as the roster adjusts after the trade.

Source Links

Yahoo Sports

Status Watch

•White Sox acquire Luis Castillo in a trade with Mariners
•Seranthony Domínguez included in the trade package
•Opportunity for pitching prospects to move up to MLB
•McDougal boasts a 2.86 ERA with 40 strikeouts in Triple-A
•Current roster move to add Castillo not yet announced

Latest Updates

1:30 PMYahoo Sports — White Sox Trade Opens Door for Top Prospect to Make MLB Debut

What they're saying

"
Chicago’s trade for Luis Castillo created a vacancy in the bullpen that could be filled by one of the organization’s most exciting pitching prospects.
— Yahoo Sports

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Boston Red Sox Chicago White Sox Seattle Mariners MLB Baseball