The 1915 Major League Baseball season was contested from April 10 to October 13, 1915. The Federal League brought an antitrust lawsuit against the National and American Leagues prior to the 1915 season. The parties eventually reached a settlement and the Federal League disbanded after the season. The Philadelphia Phillies and Boston Red Sox were the regular season champions of the National League and American League, respectively. The Red Sox then defeated the Phillies in the World Series, four games to one. Meanwhile, the Chicago Whales won the 1915 Federal League pennant.