The Chicago White Sox made a move on Saturday to bolster their organizational pitching depth by bringing in experienced right-handed reliever on a minor league deal. Following the signing, the team assigned him to their Triple-A affiliate in Charlotte, giving him an opportunity to work his way back toward the major league level.
This transaction came shortly after Guerra became available, as he had been released just two days earlier by the Atlanta Braves’ Triple-A club, the Gwinnett Stripers. (MLB.com)
At 30 years old, Guerra’s career has taken a winding path that has included time both in Major League Baseball and overseas. After spending the previous two seasons competing in Japan’s Nippon Professional Baseball league with the Hanshin Tigers, he returned to the United States during the offseason with the goal of reestablishing himself within MLB organizations.
His time in Japan included a standout 2024 campaign, during which he delivered excellent results on the mound. Over the course of 58 innings that season, Guerra posted an impressive 1.55 earned run average and successfully converted 14 save opportunities, showcasing his ability to handle late-inning pressure situations. (mlbtraderumors.com)
One of the most notable aspects of his 2024 performance in Japan was the improvement in his command. Historically, control has been a challenge for Guerra throughout his professional career, particularly during his time in the majors.
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However, during that strong season with Hanshin, he significantly reduced his walk rate, limiting opposing hitters to just a 4.9 percent walk percentage. This development suggested that he had made meaningful adjustments to his pitching approach, potentially increasing his value as a reliable bullpen arm. (mlbtraderumors.com)
Despite that success, Guerra’s second year in Japan did not go nearly as smoothly. His 2025 campaign was limited, as he appeared in only six games. The reduced workload raised questions about consistency and durability, and it ultimately led to his return to the United States in search of new opportunities.
While his first season overseas demonstrated his potential at a high level, the follow-up year left some uncertainty about whether he could sustain that performance over a longer period. (mlbtraderumors.com)
After returning stateside, Guerra signed a minor league contract with the Atlanta Braves in January, hoping to earn his way back to the majors. He was assigned to the Gwinnett Stripers, where he spent the early part of the 2026 season attempting to reestablish himself. However, his performance at Triple-A did not meet expectations.
Across 16 appearances, Guerra logged 25.1 innings but struggled to find consistency, finishing with a 5.68 ERA and a 1.78 WHIP. Those numbers reflected ongoing issues with command and effectiveness, as he allowed too many baserunners and was unable to limit damage in key situations.
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Control continued to be a significant concern during his time with Gwinnett. While he recorded 17 strikeouts, he also issued 20 walks, highlighting the same command problems that have followed him throughout his career.
This lack of control often put him in difficult situations, forcing him to pitch out of jams and increasing the likelihood of runs scoring. In addition, Guerra had a rough showing during spring training, where he surrendered five earned runs in just 2 2/3 innings, further contributing to the Braves’ decision to move on.
Ultimately, Atlanta opted to release Guerra, making him a free agent and opening the door for another organization to take a chance on his upside. The White Sox quickly stepped in, signing him to a minor league contract and assigning him to their Triple-A affiliate. For Chicago, the move represents a low-risk gamble on a pitcher who has demonstrated flashes of high-level performance, particularly during his time in Japan.
Guerra’s overall major league track record provides additional context for his career trajectory. He has appeared in parts of five MLB seasons, primarily with the San Diego Padres, while also spending time with the Tampa Bay Rays and Milwaukee Brewers.
Over that span, he has struggled to maintain consistent success at the highest level, in part due to persistent control issues. His last appearance in the majors came in 2023, when he pitched for the Rays before eventually heading overseas. (Wikipedia)
Throughout his career, Guerra has shown a combination of intriguing arm talent and inconsistency. His ability to miss bats and generate strikeouts has often been offset by an inability to consistently throw strikes, leading to elevated walk rates and inflated run prevention numbers. Even so, his strong showing in Japan demonstrated that he is capable of making adjustments and performing at a high level when everything clicks.
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For the White Sox, this signing is less about immediate impact at the major league level and more about adding experienced depth to the organization. If Guerra can rediscover the command and effectiveness he displayed during his successful stint with Hanshin, he could emerge as a viable bullpen option later in the season. On the other hand, if his struggles with control persist, he may remain a depth piece at the Triple-A level.
In essence, Guerra’s arrival in the White Sox organization represents another chapter in a career defined by both promise and unpredictability. His journey—from the major leagues to Japan and back again—highlights the challenges many players face in maintaining consistency at the highest levels of professional baseball. With Chicago, he now has another opportunity to prove that he can translate his flashes of excellence into sustained success and potentially earn his way back to the big leagues once more.
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