Particle.news
Get it on Google Play
Download on the App Store
32 ARTICLES
·
last mo.

White Sox Acquire Luis Castillo From Mariners in Deadline Blockbuster

Chicago is taking on Castillo’s remaining multi-year contract to add veteran, controllable starting pitching as it pursues the AL Central title.

Jul 8, 2025; Chicago, Illinois, USA; Chicago White Sox logo is seen on Rate Field before a baseball game between the Chicago White Sox and Toronto Blue Jays. Mandatory Credit: Kamil Krzaczynski-Imagn Images
Jul 17, 2026; Toronto, Ontario, CAN; Chicago White Sox relief pitcher Seranthony Dominguez (58) throws a pitch against the Toronto Blue Jays during the sixth inning at Rogers Centre. Mandatory Credit: Nick Turchiaro-Imagn Images
Image
Jul 3, 2026; Seattle, Washington, USA; Seattle Mariners starter Luis Castillo (58) delivers a pitch against the Toronto Blue Jays at T-Mobile Park. Mandatory Credit: Stephen Brashear-Imagn Images

Overview

  • The White Sox and Mariners completed the trade late Saturday night with Chicago acquiring three-time All-Star right-hander Luis Castillo and Seattle receiving reliever Seranthony Domínguez, outfielder Nolan Jones and catching prospect Boston Smith plus conditional cash.
  • Chicago will absorb the remainder of Castillo’s contract, roughly $22.75 million in both 2026 and 2027, and a $25 million vesting option for 2028 if he reaches 180 innings.
  • Castillo has struggled this season with a 3-9 record and a 5.06 ERA, but his career track record, workload history and postseason experience are the reasons the White Sox made a multi-year bet on him.
  • Seattle traded Castillo because it has surplus starting pitching and wanted to bolster its late-inning bullpen, outfield depth and catching pipeline by acquiring Domínguez, Jones and the high-performing Double-A prospect Boston Smith.
  • The deal reshapes both rosters immediately: Chicago adds a veteran arm to protect its division lead and may still pursue more pitching before Monday’s deadline, while Seattle reduces payroll risk and redeploys assets for depth and future upside.