Athletics Hire Brewers Executive Cam Castro as New GM

The Athletics announced on Wednesday that they have hired Milwaukee Brewers executive Cam Castro as their new general manager.

Castro, 36, joins the A's fresh off a 2026 World Series title with Milwaukee. He served there as senior vice president of player development and performance. Castro will report to Taylor Smith, the team's president of baseball operations.

Hiring Castro marks Smith's first major front-office decision since he joined the club in October. The A's will play their final West Sacramento season in 2027 before moving to Las Vegas in 2028.

Cam Castro's Path From Pitching Coach to Brewers Executive

Castro spent eight seasons in Milwaukee. He joined the Brewers in 2019 as their Single-A pitching coach. From there, he rose to minor league pitching coordinator and then director of pitching development.

The Brewers promoted him to vice president of player development in 2022 and to senior vice president of player development and performance in 2024. Most recently, he oversaw the club's skill-development strategies for minor leaguers. He also managed high-performance systems, including medical operations. Before Milwaukee, Castro coached for seven seasons at Defiance College and Lake Erie College. His experience also includes a stint as a trainer at Driveline Baseball.

"The A's are a historic franchise with an incredible legacy," Castro said in the team's announcement. He added that he looks forward to "being a part of the next chapter of A's baseball."

How Castro Fits Into Taylor Smith's Rebuilt A's Front Office

The A's named Smith president of baseball operations on October 19. At 31, he is MLB's youngest head of baseball operations. He previously served as an assistant general manager with the Boston Red Sox. Before that, he spent seven seasons with the Tampa Bay Rays. Smith praised Castro's player development background, calling him "one of the best development minds in the game."

Castro fills the vacancy left by David Forst. The team parted ways with Forst in August, ending a GM tenure that began in 2015. Dan Feinstein served as interim general manager during the search. Castro now steps in as Smith's second-in-command in the rebuilt front office.

The Challenges Facing Castro Before the A's Move to Las Vegas

Castro inherits a team that went 64-98 in 2026. The A's pitching staff posted a 5.51 ERA, the second-worst mark in the majors. That makes his long background in pitching development especially relevant.

The timing adds pressure. In 2028, the A's plan to open their new ballpark on the Las Vegas Strip. The domed stadium is rising on the former Tropicana site. A mixed-use resort development is planned around the venue.

Smith and Castro have roughly one season to shape a competitive roster before the move.

Labor uncertainty could also complicate their first offseason together, as MLB faces a possible lockout. A work stoppage might disrupt December's Winter Meetings as well.