The Baltimore Orioles are based in Baltimore, MD. One of the American League’s eight charter franchises when the league was established in 1901 with President Ban Johnson, this franchise spent its first year as a major-league club in Milwaukee, WI as the Milwaukee Brewers before moving to St. Louis, MO to become the St. Louis … More Baltimore Orioles vs. Blue Jays, Yankees, Red Sox, and Rays – September Games