White Sox To Sign Seranthony Domínguez

The White Sox and right-hander Seranthony Domínguez are in agreement on a two-year, $20MM deal, reports Jeff Passan of ESPN. Passan adds that the Epitome Sports Management is expected to be the closer for the Sox. Chicago has a full 40-man roster and will need a corresponding move to make this official.

Domínguez, 31, has mostly been an effective setup guy in his career. He debuted with the Phillies in 2018 and tossed 58 innings with a 2.95 earned run average. His 9.5% walk rate was a bit high but he struck out 32% of batters faced while inducing grounders on 55.7% of balls in play.

He missed most of the next three seasons due to injury, including a Tommy John surgery in 2020. Over the past four years, he has been back on track and his production has had a somewhat similar shape to his 2018 season. He has thrown at least 50 innings in each of those four campaigns. Put together, he tossed 222 1/3 innings for the Phillies, Orioles and Blue Jays with a combined ERA of 3.60, a 27% strikeout rate, 10.7% walk rate and 41.9% ground ball rate. He racked up 24 saves and 55 holds.

In 2025, he changed up his arsenal. He still featured a four-seamer and sinker in the upper 90s with a sweeper as one of his breaking balls, but he switched out his changeup and slider for a splitter and a curveball. That led to a career-high walk rate of 13.8% but his 30.3% strikeout rate was his best in a full season since his rookie debut. He became one of the top setup guys in Toronto’s bullpen, making 12 postseason appearances as part of that club’s run to the World Series. He had a 3.18 ERA in those, though with more walks than strikeouts.

It’s a bit of a volatile profile but the stuff is tantalizing and his results have mostly been good. Coming into the winter, there was a clear top tier of free agent closers which included Edwin Díaz, Devin Williams and Robert Suarez. Domínguez was in the next tier of solid setup guys, including Tyler Rogers, Luke Weaver, Brad Keller and others. MLBTR predicted Domínguez for a two-year deal worth $18MM and he has come in just a hair above that.

Domínguez was connected to clubs like the Red Sox and Twins in reported rumors but presumably had interest from other clubs as well. The White Sox are an interesting landing spot for him. The club is clearly in rebuild mode, having just finished their third straight 100-loss season. However, a few of their prospects had nice breakout seasons in 2025, including Colson Montgomery and Kyle Teel.

The Sox have responded with a somewhat active offseason. They bolstered their rotation by giving Anthony Kay $12MM over two years and Sean Newcomb $4.5MM on a one-year deal. Munetaka Murakami seemingly fell into their laps when no one else wanted to give him a long-term deal, so they signed him for $34MM over two years.

They did subtract Luis Robert Jr. this week, trading him to the Mets for Luisangel Acuña and pitching prospect Truman Pauley, but general manager Chris Getz said that the money saved from that deal would be reinvested in the team. Robert was set to make a $20MM salary this year, with a $2MM buyout on his $20MM option for 2027. Assuming the Domínguez deal is equally spread out across the two seasons, then he’ll be taking half of the money that was slated for Robert’s salary in 2026.

No one is likely to pick the White Sox to win the Central this year but the club is at least trying to make the roster more respectable, which is commendable. Perhaps there’s a scenario where things go especially well and they hover in the race for a few months. If not, all of their pickups have been for one or two years, keeping the long-term payroll wide open for whenever they do return to contention. Of the signees, anyone who plays well could be on the trade block this summer if the Sox are behind the pack.

For Domínguez, it’s possible he may have preferred a more surefire contender but landing in Chicago gives him a chance to close. As mentioned earlier, he has picked up a few saves in his career but has mostly been a setup guy. If he fares well in the ninth-inning job, perhaps that will help him land with a contender via trade and it could help his earning power when he returns to the open market two years from now.

He immediately becomes easily the most experienced arm in the bullpen. Newcomb, who will have a chance to earn a rotation job, is the only other pitcher on the roster with even three years of big league service time.

Last year, eight different pitchers recorded a save for the Sox. Jordan Leasure led the pack with seven, followed by Grant Taylor with six. Those two both have live arms but are still pretty inexperienced. They can work setup roles with Domínguez in the ninth. If the younger guys take a step forward or Domínguez ends up traded, then the roles could change over the course of a long season. It’s also possible the Sox make another move if Getz still has some powder dry.

With Domínguez now off the board, the relief market gets a bit more barren. Díaz, Suarez, Williams, Rogers, Weaver, Keller, Ryan Helsley, Emilio Pagán, Kyle Finnegan, Raisel Iglesias, Phil Maton, Pete Fairbanks, Kenley Jansen, Gregory Soto and others have all come off the board. The group of guys still available includes Danny Coulombe, Justin Wilson, Andrew Chafin, Evan Phillips, Scott Barlow and more.

Photo courtesy of Nick Turchiaro, Mitch Stringer, Imagn Images