DONE DEAL: White Sox officially add 5.59 ERA star to solidify bullpen

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The Chicago White Sox didn’t wait for the MLB Winter Meetings to get underway before jumping into the free-agent marketplace. Instead of letting the rest of the league set the tone in Nashville next week, Chicago made an early move on Wednesday by finalizing a deal with left-handed pitcher, formerly of the Toronto Blue Jays and most recently a standout in Japan.

Kay agreed to a two-year contract worth $12 million, a pact that also includes a club option for the 2028 season valued at $10 million, with a $2 million buyout attached. By completing this signing, the White Sox added the 35th player to their 40-man roster and addressed one of their most immediate offseason priorities: securing a reliable veteran to stabilize their starting rotation.

This signing represents a significant moment for both Kay and the White Sox. For Kay, it provides a chance to reestablish himself in Major League Baseball after an uneven first stint in North America. His five seasons in MLB were spent mostly as a reliever, where he posted a 5.59 ERA and a 1.61 WHIP, numbers that reflected inconsistency and difficulty finding a defined role.

Anthony Kay, White Sox agree on 2-year deal (source)

But his journey overseas drastically changed his trajectory. During his two seasons with the Yokohama DeNA BayStars in Nippon Professional Baseball, Kay reinvented himself as a full-time starter, thriving in a way that never materialized during his earlier MLB years.

In Japan, Kay transformed into an efficient, durable arm. Across a little more than 300 innings with Yokohama, he recorded a 2.49 ERA, a 1.13 WHIP, and allowed only 84 earned runs. His most recent campaign was especially impressive: a 9–6 record, a 1.74 ERA, and a WHIP below 1.00 over 155 innings.

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These numbers reflect not only a pitcher who learned to command his arsenal with far greater precision but also someone who benefited from consistent usage and the opportunity to develop his repertoire in ways that weren’t possible when he was bouncing between the bullpen and Triple-A back in the United States.

Anthony Kay, White Sox agree on 2-year deal (source)

White Sox general manager Chris Getz has shown a clear willingness to identify pitchers who revived their careers overseas, and Kay represents the latest example of that strategy. Getz famously did the same thing a year earlier when he brought back Erick Fedde, another left-hander whose major-league struggles pushed him to explore opportunities abroad.

Fedde, after years of inconsistency with the Washington Nationals, excelled in the KBO and returned to MLB on a two-year, $15 million contract with the White Sox. His 2024 season turned into a major success: he served as a steady presence in the rotation, logged meaningful innings, and acted as a veteran mentor for a rotation full of inexperienced arms.

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Kay’s addition suggests the White Sox are hoping lightning might strike twice. While Fedde was ultimately valuable both on the mound and inside the clubhouse, Chicago believes Kay could provide similar advantages—and potentially even more.

White Sox add lefty Anthony Kay to rotation ahead of Winter Meetings |  South Side Sox

The upside is intriguing: if his NPB-level performance translates even partially to MLB, he could give the White Sox a legitimate middle-of-the-rotation or even upper-rotation contributor. If everything breaks correctly, Kay might evolve into one of the more surprising contributors of the 2025 season, just as Fedde did the year before.

Of course, the transition from Japan back to North America is always unpredictable. Not every pitcher who thrives overseas finds the same success once they return to MLB hitters, who are known for patience, power, and the ability to punish mistakes consistently. That, in many ways, will be Kay’s greatest challenge.

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His revamped pitch mix, improved command, and newfound confidence will be put to the test in a division that includes dangerous offenses like those of the Minnesota Twins and Cleveland Guardians. The White Sox know this, but considering their current phase of rebuilding, the risk is minimal compared to the possible payoff.

Chicago White Sox Sign Pitcher From Japanese League

For Chicago, this signing also provides immediate benefits beyond potential upside. Adding a left-handed starter gives the rotation balance and stability, especially given how young their pitching staff is. Kay brings experience, durability, and a level of maturity that can help a team still searching for long-term building blocks.

Even if Kay does not replicate his NPB dominance in full, he still projects as a dependable option to take the ball every fifth day, something the White Sox desperately lacked during their recent struggles.

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From a strategic standpoint, Kay also represents a possible future trade asset. If he performs well between April and July, his manageable contract and left-handed profile could attract playoff-bound teams looking to shore up depth. The White Sox, firmly in Year 2 of their rebuild, could flip him for prospects at the trade deadline—much like teams often do with veterans on short-term deals. That scenario alone makes this signing a low-risk, high-reward maneuver.

Report: White Sox bring Kay back to MLB on 2-year, $12M deal | theScore.com

Getz’s approach to the offseason is becoming clearer with each move he makes. Rather than chasing expensive, headline-grabbing free agents, the White Sox appear committed to identifying undervalued players, particularly pitchers, whose stock has risen overseas or whose potential remains untapped.

This “buy low, develop internally, and sell high” philosophy fits perfectly with the economical model of a rebuilding franchise that is looking to accumulate assets while keeping payroll flexible.

Although such moves may not generate splashy headlines or immediate excitement among fans, they reflect a disciplined and calculated front-office approach. Big rebuild transformations aren’t usually powered by blockbuster transactions; they are shaped by small but shrewd acquisitions that add depth, create competition, and occasionally yield breakout contributors.

Anthony Kay makes strong return in third go-around with Mets | New York Post

For White Sox fans, Kay’s arrival signals the type of targeted aggression they should expect from their team over the next several weeks. The Winter Meetings could bring additional low-cost, upside-heavy signings as Chicago attempts to fortify its roster without sacrificing long-term flexibility. The strategy might not be glamorous, but if executed effectively, it can position the franchise for meaningful progress.

In the end, the Anthony Kay signing is more than just the addition of another arm. It represents a philosophical continuation of how the White Sox intend to reshape their identity: through calculated risks, international scouting success, and a willingness to believe in second chances.

Whether Kay becomes a steady innings-eater, a midseason trade asset, or even a surprising new ace, his journey back to MLB will undoubtedly be one of the more intriguing storylines to follow as the South Siders move through another pivotal offseason.

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