A baseball game between the Baltimore Orioles and the Chicago White Sox sets the all-time low attendance mark for Major League Baseball. Zero fans were in attendance for the game, as the stadium was officially closed to the public due to the 2015 Baltimore protests.

The Baltimore Orioles are an American professional baseball team based in Baltimore. The Orioles compete in Major League Baseball (MLB) as a member club of the American League (AL) East Division. As one of the American League's eight charter teams in 1901, the franchise spent its first year as a major league club in Milwaukee as the Milwaukee Brewers before moving to St. Louis to become the St. Louis Browns in 1902. After 52 years in St. Louis, the franchise was purchased in 1953 by a syndicate of Baltimore business and civic interests, led by attorney and civic activist Clarence Miles and Mayor Thomas D'Alesandro Jr. The team's current owner is David Rubenstein. The Orioles' home ballpark is Oriole Park at Camden Yards, which opened in 1992 in downtown Baltimore. The oriole is the official state bird of Maryland; the name has been used by several baseball clubs in the city, including another AL charter member franchise which folded after the 1902 season and was replaced the next year by the New York Highlanders, later the Yankees. Nicknames for the team include the "O's" and the "Birds".

The Chicago White Sox are an American professional baseball team based in Chicago. The White Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) Central Division. The club plays its home games at Rate Field, which is located on Chicago's South Side. They are one of two MLB teams based in Chicago, alongside the National League (NL)'s Chicago Cubs. The White Sox are known as the "South Siders", a reference to the location of their home park.

On April 29, 2015, the Baltimore Orioles defeated the Chicago White Sox 8–2 in the first crowdless game ever played by Major League Baseball teams. The lack of crowds was due to civil unrest in Baltimore following the death of Freddie Gray, an African-American man who was fatally injured while in police custody 10 days earlier. With all the civil unrest, there were insufficient security resources available for the game. The previous two games in the teams' series had been postponed, but the remaining game could neither be moved to another venue on short notice nor made up later in the season, so the decision was made to play the game at Camden Yards without allowing any fans to attend. The scheduled evening start time was also moved up to the afternoon for security reasons.