1915 Major League Baseball season

The 1915 major league baseball season began on April 10, 1915. The Federal League regular season ended on October 3, and saw the Chicago Whales winning the Federal League pennant. The regular season for the National League and American League ended on October 7, with the Philadelphia Phillies and Boston Red Sox as the regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the 12th World Series on October 8 and ended with Game 5 on October 13. The Red Sox defeated the Phillies, four games to one.

The Indianapolis Hoosiers relocated to Newark, New Jersey as the Newark Peppers. The Buffalo Buffeds, Chicago Federals, and Cleveland Naps renamed as the Buffalo Blues, Chicago Whales, and Cleveland Indians, respectively.

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 major-league status of the Federal League was confirmed by the Special Baseball Records Committee (as convened by then-Commissioner of Baseball William Eckert) in 1969.

Schedule
The 1915 schedule consisted of 154 games for all teams in the American League, National League, and Federal League, each of which had eight teams. Each team was scheduled to play 22 games against the other seven teams of their respective league. This continued the format put in place for the season, and which lasted until the 140-game schedule of. Most teams played more than 154 games, due to tie games (called on account of darkness or weather) that had to be replayed; tie games are excluded from team standings, but the statistics of individual players are included in their season totals.

The Federal League had its Opening Day on April 10, featuring all eight teams. Opening Day for the American and National Leagues was on April 14, featuring the 16 teams of those two leagues, as had been scheduled the season prior. The Federal League had the final day of its regular season on October 3. The final day of the regular season for the National and American Leagues was October 7. The World Series took place between October 8 and October 13.

Teams
An asterisk (*) denotes the departure from a ballpark mid-season.

Bracket
 

National League
1 National League Triple Crown pitching winner

Home field attendance
Note: Attendance data for Federal League teams is unavailable.

Events

 * May 6 – Babe Ruth of the Boston Red Sox hits the first of his career 714 home runs.