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Mariners Shake up Roster, Trading Luis Castillo to the White Sox Ahead of Deadline

Chicago adds a three-time All-Star and takes on his contract as Seattle gets bullpen help, an outfielder and a catching prospect.

  • On Saturday, the Chicago White Sox acquired veteran starting pitcher Luis Castillo from the Seattle Mariners. Seattle received relief pitcher Seranthony Dominguez, outfielder Nolan Jones, and catching prospect Boston Smith.
  • Chicago will absorb the remaining money on Castillo's contract, covering the pro-rated $22.75M for this year and $22.75M next year. The deal includes a $25 million vesting option for 2028 if he reaches at least 180 innings.
  • Despite a 5.06 ERA this season, the White Sox are counting on Castillo's veteran leadership. The three-time All-Star has started at least 30 games in each of the past three seasons, providing proven reliability.
  • The Mariners, currently 54-58 and trailing the Houston Astros in the AL West, acquired prospect Boston Smith to fill the void left by catcher Harry Ford's departure last offseason.
  • With the trade deadline approaching on Monday, sources indicate Seattle remains active and is listening on players like Randy Arozarena and George Kirby. The shift signals potential roster changes before the deadline closes.
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White Sox add veteran RHP Luis Castillo, send 3 players to Mariners

The Chicago White Sox bolstered their pitching staff by acquiring three-time All-Star right-hander Luis Castillo from the Seattle Mariners on Saturday night. The Mariners receive right-handed reliever Seranthony Dominguez, outfielder Nolan Jones, Chic...

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+18 Reposted by 18 other sources
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Mariners shake up roster, trading Luis Castillo to the White Sox ahead of deadline

The Seattle Mariners have traded right-hander Luis Castillo to the Chicago White Sox in exchange for right-hander Seranthony Domínguez, outfielder Nolan Jones and catching prospect Boston Smith and cash considerations

·New York, United States
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The spokesman-Review broke the news in Spokane, United States on Saturday, August 1, 2026.
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