Wrigley Field is a baseball park located on the North Side of Chicago, Illinois. It is the home of the Chicago Cubs, one of the city's two Major League Baseball (MLB) franchises. It first opened in 1914 as Weeghman Park for Charles Weeghman's Chicago Whales of the Federal League. The Cubs played their first home game at the park on April 20, 1916, defeating the Cincinnati Reds with a score of 7–6 in 11 innings. Chewing gum magnate William Wrigley Jr. of the Wrigley Company acquired complete control of the Cubs in 1921. It was named Cubs Park from 1920 to 1926, before being renamed Wrigley Field in 1927.

Baseball executive Charles Weeghman hired his architect Zachary Taylor Davis to design the park, which was ready for baseball by the date of the home opener on April 23, 1914. The original tenants, the Chicago Whales (also called the Chi-Feds) came in second in the Federal League rankings in 1914 and won the league championship in 1915.

In late 1915, Weeghman's Federal League folded. The resourceful Weeghman formed a syndicate including the chewing gum manufacturer William Wrigley Jr. to buy the Chicago Cubs from Charles P. Taft for about $500,000. Weeghman immediately moved the Cubs from the dilapidated West Side Grounds to his two-year-old park.

In 1918, Wrigley acquired the controlling interest in the club. In 1927, an upper deck was added, and in 1937, Bill Veeck, the son of the club president, planted ivy vines against the outfield walls.

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