Luis Castillo Is Creating A White Sox Deadline Fear Fans Saw Coming

The Chicago White Sox's gamble on Luis Castillo as a mid-season reinforcement comes under scrutiny as his lackluster performance raises questions about a potentially costly misstep.

The White Sox went into the trade deadline needing pitching help, and they paid for it in a big way.

Chicago was sitting atop the AL Central when the deadline passed, but with less than a month left in the regular season, the Guardians are still close enough to make the division race uncomfortable. The Sox brought in arms to steady the rotation, yet the early returns have been ugly. Huascar Brazoban has disappointed, and Luis Castillo has been even tougher to stomach.

That’s where the money starts to sting. As USA Today’s Bob Nightengale pointed out, Chicago took on the full $30 million remaining on Castillo’s contract in the deal with the Seattle Mariners, a move that already looks risky given how little payoff they’ve gotten so far.

"Castillo is yielding a 7.52 ERA and has lasted just 26.1 innings in his six starts," Nightengale writes. "Oh, and they assumed the entire $30 [million] remaining in his contract too."

Castillo came in as a buy-low swing: a former three-time All-Star who had been struggling in Seattle, but still carried the reputation of a proven starter. Instead, the White Sox have gotten a pitcher who has looked far removed from that version of himself.

Since the trade, Castillo has posted a 7.52 ERA for Chicago and has become one of the club’s worst midseason additions in the middle of a tight AL Central fight with Cleveland.

The numbers have only gotten more damning. In six appearances for the White Sox, Castillo has already been worth -0.5 bWAR, making him a clear negative for the team barely a month after arriving.

His latest start in September was the low point. Castillo lasted only four innings against the Houston Astros, gave up six earned runs, and took part in a crushing loss that left his former team further behind in the AL West chase and the Wild Card picture.

There is still time for Castillo to settle in, both this season and over the next two years on his contract, which runs through 2027 and includes a vesting option for 2028. But at 33, the right-hander has not given the White Sox much reason to believe a turnaround is coming soon.

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