The 2011 NBA lockout was the fourth and most recent lockout in the history of the National Basketball Association (NBA). Team owners began the work stoppage upon expiration of the 2005 collective bargaining agreement (CBA). The 161-day lockout began on July 1, 2011 and ended on December 8, 2011. It delayed the start of the 2011–12 regular season from November to December, and it reduced the regular season from 82 to 66 games. The previous lockout in 1998–99 had shortened the season to 50 games. During the lockout, teams could not trade, sign, or contact players. Players additionally did not have access to NBA team facilities, trainers, or staff.

David Joel Stern was an American lawyer and business executive who was the commissioner of the National Basketball Association (NBA) from 1984 to 2014. Stern oversaw NBA basketball's growth into one of the world's most popular sports during the 1990s and 2000s. He is credited with developing and broadening the NBA's audience, especially internationally by setting up training camps, playing exhibition games, and recruiting more international players. In addition, with Stern's guidance the NBA opened 12 offices in cities outside the United States, and broadcast to over 200 territories in over 40 languages. Stern also helped found the Women's National Basketball Association and the NBA G League, the NBA's development league. Under Stern, the NBA launched their digital presence with NBA.com, NBA TV, and NBA League Pass. He also established the NBA's social responsibility program, NBA Cares.