History of the NBA Timeline

Created byEeasytimelines

A milestone history of the National Basketball Association, covering its formation, landmark franchises, championship dynasties, and defining players.

📅 21 events1946-2024Updated Oct 2026
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Every event in this timeline

Jan 1, 1946

Basketball Association of America founded

The BAA begins play, providing the direct organizational predecessor of the NBA.

Jan 1, 1949

NBA formed

The BAA and National Basketball League merge to form the National Basketball Association.

Jan 1, 1954

24-second shot clock introduced

The NBA adopts the 24-second shot clock, transforming the pace of play.

Jan 1, 1956

Bill Russell drafted

Boston selects Bill Russell, who becomes central to the Celtics dynasty.

Jan 1, 1967

ABA founded

The rival American Basketball Association begins play and later contributes teams and innovations to the NBA.

Jan 1, 1976

ABA-NBA merger

Four ABA franchises join the NBA, expanding the league and bringing in the 3-point line later.

Jan 1, 1979

3-point line adopted

The NBA introduces the 3-point field goal line for the 1979-80 season.

Jan 1, 1980

Bird and Magic enter the Finals era

The Celtics-Lakers Finals series symbolizes a new national television era for the league.

Jan 1, 1984

Michael Jordan drafted

Chicago selects Michael Jordan, who becomes one of the league's defining stars.

Jan 1, 1988

NBA expands to 27 teams

Charlotte and Miami begin play as expansion franchises, followed soon by Minnesota and Orlando.

Jan 1, 1992

Dream Team wins Olympic gold

NBA stars represent the United States at the Barcelona Olympics and win gold.

Jan 1, 1996

WNBA established

The WNBA is founded as a sister league to the NBA and begins play in 1997.

Jan 1, 1999

San Antonio wins first championship

The Spurs win the first championship of the Duncan-era franchise.

Jan 1, 2004

NBA changes defensive rules

The league removes hand-checking restrictions and emphasizes perimeter freedom in the modern game.

Jan 1, 2010

LeBron James joins Miami

James announces his move to the Miami Heat, reshaping the league's player-movement era.

Jan 1, 2015

Golden State wins first title of the Curry era

The Warriors win the championship behind a pace-and-3-point oriented style.

Jan 1, 2016

Cavaliers win Cleveland's first NBA title

Cleveland defeats Golden State after coming back from a 3-1 Finals deficit.

Jan 1, 2019

Toronto wins first NBA title outside the United States

The Raptors defeat Golden State in the Finals.

Jan 1, 2020

NBA finishes season in Orlando bubble

The league resumes and completes its season at Walt Disney World after the COVID-19 suspension.

Jan 1, 2023

NBA In-Season Tournament debuts

The first NBA In-Season Tournament culminates in a Las Vegas championship game.

Jan 1, 2024

Boston wins its 18th championship

The Celtics defeat Dallas and move ahead of the Lakers for the most NBA championships.