The modern Orioles franchise can trace its roots back to the original Milwaukee Brewers of the minor Western League, beginning in 1894 when the league reorganized. The Brewers were there when the WL renamed itself the American League in 1900
History
The Miles-Krieger (Gunther Brewing Company)-Hoffberger group renamed their new team the Baltimore Orioles soon after taking control of the franchise. The name has a rich history in Baltimore, having been used by a National League team in the 1890s. In 1901, Baltimore and McGraw were awarded an expansion franchise in the growing American League, naming the team the Or