Showalter's first game as manager will be Tuesday, Aug. 3 against the Los Angeles Angels, the first game of a seven-game homestand.
Since firing Dave Trembley in June, the Orioles considered Eric Wedge and Bobby Valentine before making their decision. The 54-year-old Showalter has managed eleven seasons with the Yankees, Diamondbacks, and Rangers, compiling a 313-268 record.
The Orioles are 31-69 this season, though they've rebounded slightly after their 15-40 start under Trembley.
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