The White Sox aren't rebuilding quietly anymore. Just before Monday's trade deadline, Chicago swung a deal to bring in right-hander Luis Castillo from the Mariners, sending reliever Seranthony Dominguez, outfielder Nolan Jones and catching prospect Boston Smith to Seattle. Jeff Passan broke the news first, with Jon Heyman and Mark Feinsand quickly confirming the framework.
BREAKING: The Chicago White Sox are acquiring right-hander Luis Castillo in a trade with the Seattle Mariners for reliever Seranthony Dominguez, outfielder Nolan Jones and catching prospect Boston Smith, sources tell ESPN.
The confirmations came in fast. Heyman's own report landed within minutes of Passan's, and Feinsand tacked on that Passan was the one driving the reporting — the kind of rapid-fire deadline stacking that tells you a deal is real and not just smoke.
The White Sox are acquiring Luis Castillo from the Mariners for Seranthony Dominguez, Nolan Jones and Boston Smith, per source. @JeffPassan on it.
On paper this is a weird buy. Castillo, 33, is having arguably the worst year of his career — 3-9 with a 5.06 ERA across 17 starts, getting hit around for 107 hits in just 99 1/3 innings. He's also in year 4 of the five-year, $108 million extension he signed with Seattle, a deal that carries a vesting option for 2028. According to MLB.com, the White Sox are taking on the entirety of what's left, roughly $30 million through 2027 — a full-price bet on a pitcher currently pitching like anything but an ace.
So why do it? Because two years ago Castillo was a legitimate frontline starter, a two-time All-Star with swing-and-miss stuff and a track record of turning seasons around. The White Sox are betting the down year is an outlier, not the new normal, and they're paying for the name recognition and the ceiling as much as the current stat line. For a franchise that's been allergic to spending real money on pitching, absorbing $30 million for a struggling veteran is a genuine departure from form.
The return for Seattle isn't nothing, either. Dominguez was 4-3 with a 4.10 ERA and 12 saves for Chicago this year and is under contract through 2027 on the two-year, $20 million deal he signed over the winter — instant bullpen help for a Mariners team that just cleared a big chunk of long-term payroll off the books. Jones adds outfield depth, and Smith gives Seattle a Double-A catching prospect to develop. It's the classic contender-for-salary-relief swap, just running in an unusual direction with a rebuilding team taking on the money.
WHITE SOX ADD LUIS CASTILLO MY GOODNESS
That last reaction sums up the vibe around this one — nobody expected the White Sox to be the team eating a $30 million contract for a pitcher with a losing record and an ERA over 5. Whether it looks smart depends entirely on whether Castillo can find his 2023 form in a new city, but for a franchise starved for buzz, landing a recognizable arm at the deadline is at least a start.