White Sox Sign Seranthony Domínguez to Two-Year, $20M Deal

The Chicago White Sox signed RHP Seranthony Domínguez to a two-year, $20 million contract on January 23, 2026. The deal includes a $1 million signing bonus, $7 million in 2026 and $10 million in 2027, and a $12 million mutual option for 2028 ($2 million buyout); incentives can push the total guarantee to $22 million. The 31-year-old fireballer is expected to serve as the team’s primary closer.

The Pitcher

Domínguez’s fastball averaged 97.7 mph in 2025. He pitched 62⅔ innings in 67 appearances for the Baltimore Orioles and Toronto Blue Jays, posting a 3.16 ERA with 79 strikeouts and 36 walks. He has 29 career postseason appearances with a 1.86 ERA, including significant work during Toronto’s 2025 World Series run.

Context

The White Sox signed Domínguez after trading Luis Robert Jr. to the Mets, using freed-up salary to reinvest. The move is part of a busy offseason that also included signings of Munetaka Murakami, Anthony Kay, and Sean Newcomb, plus a trade for Luisangel Acuña.

What It Means for AthX

As the projected closer, Domínguez should see high-leverage innings and save opportunities—dynamic pricing will reflect his role and usage. Relief-only arms often have more volatile game-by-game value; his strikeout rate and role make him relevant for portfolio construction. White Sox bullpen and win expectancy may factor into how his outings are valued. Browse the marketplace to see how bullpen moves affect player values on AthX. *Sources: The Athletic, FutureSox, MLB.com, NY Post, ESPN. Fact-checked February 1, 2026.*