White Sox Sign Seranthony Domínguez to Bolster Bullpen

Title: White Sox Bolster Bullpen Experience with Seranthony Domínguez Signing

The Chicago White Sox just made another notable offseason move, agreeing to a two-year, $20 million contract with veteran right-hander Seranthony Domínguez.

For a franchise coming off three straight 100-loss seasons, this signing feels like a step toward stabilizing the bullpen and a calculated bet on experience, upside, and maybe even future trade value.

Domínguez’s arrival gives Chicago a proven late-inning arm and a respected clubhouse presence as the organization keeps working through its rebuild.

Domínguez Brings a Proven Track Record to Chicago

At 31, Seranthony Domínguez has already lived several baseball lives. Since his 2018 debut, he’s built a reputation as a reliable setup man who can miss bats when it matters most.

His rookie year hinted at stardom—he put up a sharp 2.95 ERA and quickly earned trust in high-leverage spots.

Consistency Despite an Injury-Plagued Middle Chapter

Injuries knocked Domínguez off course between 2019 and 2021, especially after a Tommy John surgery in 2020. Still, you’ve got to give him credit for his resilience.

Over the past four seasons, he’s thrown at least 50 innings each year, totaling 222 1/3 innings with a solid 3.60 ERA. That run shows both his durability and effectiveness after losing significant time.

During those four years, Domínguez put up numbers front offices love to see in modern bullpens:

Reinventing His Arsenal in 2025

One thing that stands out about Domínguez is his willingness to adapt. In 2025, he shook up his pitch mix, adding a splitter and curveball while dropping his changeup and slider.

It was a risky move, but the results really jumped off the page.

Higher Strikeouts, Higher Risk

The new arsenal pushed his strikeout rate to a career-high 30.3%. Clearly, he can still overpower hitters.

But the flip side? His walk rate spiked to 13.8%. Control issues definitely raised some eyebrows, but he kept missing bats, especially when games were on the line.

That effectiveness showed up in the postseason, too. Toronto leaned hard on Domínguez during its World Series run.

He pitched in 12 playoff games, putting up a 3.18 ERA. Even though he issued more walks than strikeouts in October, his calm under pressure only added to his reputation as a battle-tested reliever.

A Strategic Fit for a Rebuilding White Sox Team

The White Sox have been pretty active this offseason, clearly aiming to reshape the roster without locking themselves into big, long-term deals.

Domínguez fits that plan. His two-year contract matches the club’s timeline and gives the bullpen an instant leader.

Closer Potential and Trade Value

He’s now the most experienced arm in Chicago’s relief corps and could easily open the season as closer. If he thrives, the White Sox get both a boost on the field and a possible trade chip at the deadline.

For a rebuilding team, that kind of flexibility is hard to overvalue.

Chicago’s recent moves—short-term rotation depth signings, the two-year, $34 million deal for Munetaka Murakami, and trading Luis Robert Jr. to the Mets—show a calculated reset.

Adding Domínguez strengthens the bullpen right now while keeping doors open for the future.

Impact on the Free-Agent Relief Market

With Domínguez off the board, the free-agent relief market keeps shrinking. Several top bullpen arms have already signed.

Chicago’s move feels both timely and opportunistic. For the White Sox, this signing is about credibility and leadership.

 
Here is the source article for this story: White Sox To Sign Seranthony Domínguez