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Armbruester underwent right lat surgery Friday, Andy Kostka of TheBaltimoreBanner.com reports.

The Orioles have not provided a timetable for the right-hander, but it's possible the surgery ends his 2025 season. Armbruester moved to the bullpen at Triple-A Norfolk this season and had allowed two unearned runs with a 7:3 K:BB over 5.2 frames.