The Baltimore Orioles are an American professional baseball team based in Baltimore, Maryland, that competes in Major League Baseball (MLB). They are a member of the East Division of the American League (AL). One of the AL's eight charter franchises when the league was established in 1901 with President Ban Johnson; this particular franchise spent its first year as a major league club in Milwaukee, Wisconsin as the "Milwaukee Brewers" before moving to St. Louis, Missouri to become the "St. Louis Browns". After 52 often-beleaguered years in St. Louis, the franchise was purchased in November 1953 by Baltimore business interests led by Clarence Miles. The franchise officially moved to Baltimore for the 1954 season and adopted the historic "Orioles" name in honor of the official state bird of Maryland. The Orioles name had also been used by several previous major and minor league baseball clubs in Baltimore, including the franchise that would eventually become the New York Yankees. Nicknames for the team include the "O's" and the "Birds".

Oriole Park at Camden Yards

The New York Yankees are an American professional baseball team based in the Bronx borough of New York City that competes in Major League Baseball (MLB) in the American League's (AL) East Division. They are one of two MLB clubs based in New York City, the other club being the New York Mets. One of the AL's eight charter franchises, the club was founded in Baltimore, Maryland in 1901 as the Baltimore Orioles. The team moved to New York City in 1903 and became the New York Highlanders, before taking "Yankees" as their official name in 1913. The team is owned by Yankee Global Enterprises, an LLC controlled by the family of George Steinbrenner, who purchased the team in 1973. Former catcher Joe Girardi is the team's manager, and Brian Cashman is the team's general manager. Yankees home games were played at Yankee Stadium from 1923 to 1973 and from 1976 to 2008. In 2009, they moved into a new ballpark also called Yankee Stadium after the previous venue closed. The team is perennially among the leaders in MLB attendance—in 2011, the Yankees had the second-highest attendance. One of the most successful clubs in professional sports history worldwide, the Yankees have won 18 division titles, 40 AL pennants, and 27 World Series championships, all of which are MLB records. Forty-four Yankees players and 11 Yankees managers have been inducted into the National Baseball Hall of Fame, including Babe Ruth, Lou Gehrig, Joe DiMaggio, Mickey Mantle, and Yogi Berra. In pursuit of winning championships, the franchise has utilized a large payroll to recruit talent, particularly under former owner George Steinbrenner. According to Forbes, in 2013, the Yankees are the highest valued sports franchise in the United States, and fourth in the world, with an estimated value of approximately $2.3 billion. Due in part to their success, the Yankees have garnered enormous popularity worldwide and a dedicated fanbase, as well as widespread enmity from fans of other MLB teams; the team's intense rivalry with the Boston Red Sox is one of the most well-known rivalries in sports.