The MLB offseason continues to bring significant changes around the league, with the reigning World Series champion Milwaukee Brewers losing an important member of their championship staff to the Athletics.
According to MLB insider Ken Rosenthal, the Athletics are hiring Cam Castro as their new general manager. Castro will work under the organization’s new president of baseball operations, Taylor Smith, as the franchise looks to turn things around heading into the 2027 season.
The Athletics are hiring Cam Castro away from the World Series champion Milwaukee Brewers as their general manager under new president of baseball operations Taylor Smith, league sources tell The Athletic.
— Ken Rosenthal (@Ken_Rosenthal) November 4, 2026
The move represents a significant loss for Milwaukee, which is coming off a historic 2026 campaign that saw the franchise capture its first World Series championship.
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Castro brings extensive player development experience
Castro most recently served as the Brewers’ senior vice president of player development and performance, where he played an important role in developing the organization’s young talent.
He also brings extensive experience in pitching development, an area that helped him quickly establish himself within the Milwaukee organization.
Castro joined the Brewers in 2019 as a minor league pitching coach and steadily worked his way up the organizational ladder. He eventually became the minor league pitching coordinator before moving into the role of director of pitching development.
His responsibilities continued to grow, ultimately leading to his promotion to vice president of player development and performance.
That progression made Castro an important part of the Brewers’ baseball operations department and their eventual championship success.
Now, he will have an opportunity to take on a major leadership position with an organization hoping to establish itself as a legitimate contender.
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Athletics hope to turn things around in 2027
For the Athletics, bringing in Castro represents an important step toward building a more competitive franchise.
The club has struggled near the bottom of the American League standings over the past half-decade and is hoping a fresh approach to player development and roster construction can help change its fortunes.
Castro’s experience with a championship organization could prove valuable as the Athletics attempt to build a sustainable winner.
Having helped Milwaukee reach the pinnacle of the sport, he now faces the challenge of bringing that same winning culture to a franchise desperately searching for success.
The Athletics will be counting on Castro to help guide their baseball operations department as they prepare for the 2027 MLB season.
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