The Boston Red Sox are a Major League Baseball (MLB) team based in Boston, Massachusetts. From 1912 to the present, the Red Sox have played in Fenway Park.^[1] The "Red Sox" name originates from the iconic uniform feature. They are sometimes nicknamed the "BoSox", a combination of "Boston" and "Sox" (as opposed to the "ChiSox"), the "Crimson Hose", and "the Olde Towne Team".^[2] Most fans simply refer to them as the Sox.

One of the American League's eight charter franchises, the club was founded in Boston in 1901. They were a dominant team in the early 20th century, defeating the Pittsburgh Pirates in the first World Series in 1903. They won four more championships by 1918, and then went into one of the longest championship droughts in baseball history. Many attributed the phenomenon to the "Curse of the Bambino" said to have been caused by the trade of Babe Ruth to the New York Yankees in 1920. The drought was ended and the "curse" reversed in 2004, when the team won their sixth World Series championship.^[3] Championships in 2007 and 2013 followed. Every home game from May 15, 2003, through April 10, 2013, was sold out—a span of 820 games over nearly ten years.^[4] The team most recently won the World Series in 2018, the ninth championship in franchise history.

The number of regular season games scheduled each season has varied over time, from as low as 140 to the current 162, which has been in place since 1961.

Not all scheduled games are played each season, for reasons such as work stoppages or, infrequently, rained-out games that are not rescheduled. Prior to the delayed-start 2020 season, when teams played a reduced schedule of 60 games and only faced opponents within their own division, the most recent season during which the Red Sox did not play a full 162-game schedule was 2001, when they played 161 games.

Updated through completion of the 2023 season.
Source:^[128]

Updated through completion of the 2023 season.

• ^a For all American League pennant winners see List of American League pennant winners
• ^b The World Series was canceled after the New York Giants refused to play.
• ^c The season was partially canceled due to a players' strike that lasted 50 days. See 1981 Major League Baseball strike.
• ^d The season was partially canceled due to a players' strike that lasted 223 days. See 1994–95 Major League Baseball strike.
• ^e The Red Sox finished 95–67 and with the same record as the New York Yankees, but since the Yankees had won the season series between the two teams, the Yankees were declared division winners and the Red Sox qualified for the postseason as the American League Wild Card.
• ^f Total games count is the sum of wins and losses—consistent with major-league record keeping, tie games are excluded from team records and season standings although individual player statistics are counted.