NBA playoffs

• 1. Introduction

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  The NBA playoffs began on the 2nd of April, 1947, when six teams gathered to compete in a three-stage tournament loosely modeled on the Stanley Cup playoffs of the 1930s. That first postseason lasted just 21 days for the Chicago Stags and produced the Philadelphia Warriors as champions. What followed over the next eight decades was a continuous experiment in competition design: how many teams should qualify, how many games should settle a series, and what structure best rewards the regular season's best teams while leaving room for the unexpected? Those questions have never stopped being asked. The format has been revised dozens of times, from round robins in 1954 to the play-in tournament that became permanent in 2023. Along the way, the playoffs gave basketball some of its most defining records: an eighth seed winning a championship series for the first time in 2007, a team navigating a full postseason without a single home-court advantage, and a franchise that has reached the Finals 19 times and won 17. How a single-elimination postseason became a sprawling two-month event involving 20 teams is a story of growth, controversy, and occasional structural chaos.

• 2. Origins and Early Structure

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  Philadelphia Warriors won the 1947 championship by beating the Western champion Chicago Stags four games to one, but they arrived at the final through an unusual bracket. The early BAA tournament did not simply seed all teams from best to worst. Division champions were matched directly against each other in a best-of-seven semifinal. Meanwhile, the four runners-up played a separate best-of-three bracket to produce a second finalist. Both years that format ran, 1947 and 1948, the team that emerged from the runners-up bracket rather than the division-champions path went on to win the title. In 1948, the Baltimore Bullets beat the Eastern champion Philadelphia Warriors in the final after having played fewer tournament games than their opponents.

  The 1949 reorganization addressed this quirk by splitting the bracket so Eastern teams faced only Eastern teams and Western teams faced only Western teams, guaranteeing one playoff champion from each side. The NBA inherited this principle after absorbing the BAA and NBL in 1949. The 1950 tournament added a third division to accommodate a transitional season, and the Minneapolis Lakers became the first team to win a championship under the NBA name. They beat Anderson in a best-of-three before defeating the Syracuse Nationals in six games.

• 3. Decades of Expansion

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  With only nine league members in 1953-54, the NBA did something it has never repeated: it ran a round-robin postseason. Three teams from each division played four games against each other to determine the division finalists, before reverting to a knockout format. The experiment lasted one year. By 1955, the league replaced it with a bye system that gave first-place teams in each division a direct path to the division finals while second and third seeds played a best-of-three. Those byes sometimes left the top team idle for nearly two weeks.

  The tournament grew incrementally. Division finals expanded to best-of-seven in 1958. Division semifinals followed in 1961, also stretching to best-of-five. Each change tracked the league's expansion in size. A fifth and sixth team were added to each division in 1975 and 1977, requiring a new first round. The decisive expansion came in 1984, when the field grew from 12 teams to 16 and all four rounds were contested. In 2003 the first round became best-of-seven, eliminating the last best-of-five series in the bracket.

• 4. The 2006 Controversy

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  When Charlotte joined the league as the 30th franchise in 2004, the NBA realigned into six divisions of five teams each. The seeding rules that came with that alignment contained a flaw that took only two seasons to become obvious. Division champions were guaranteed a top-three seed regardless of their actual record. If two of the three best teams in a conference happened to share a division, the second-best was seeded no higher than fourth. That meant they could meet in the second round rather than the conference finals.

  In the 2005-06 season, the San Antonio Spurs and Dallas Mavericks, both from the Southwest Division and holding the second- and third-best records in the entire league, met in the conference semifinals precisely because of this rule. The collision drew widespread criticism. In August 2006, the NBA announced a change effective the following season: the top four seeds in each conference would be awarded by win-loss record, not divisional affiliation. The official justification was explicit: the new system guaranteed that the top two teams in each conference could not meet until the conference finals. In 2016 the league went further, removing all automatic berths and guaranteed top-four placements for division champions entirely.

• 5. The Play-In Tournament

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  The play-in concept appeared in limited form during the 2020 postseason, applied only in the Western Conference after the Memphis Grizzlies finished within half a game of the eighth-seeded Portland Trail Blazers. Portland eliminated Memphis in the first game of a best-of-two series to advance. The structure was described as a best-of-two where the higher seed needed only one win.

  In 2021 the format was rebuilt into the current version. The top six teams in each conference advance directly. Teams ranked seventh through tenth compete in a short tournament: the seventh- and eighth-place teams play each other, with the winner taking the seventh seed; the ninth and tenth seeds play an elimination game, with the winner facing the loser of the seven-eight game for the eighth spot. The 2023 Miami Heat became the first eighth seed to win a playoff series after qualifying through play-in, and also the first team to reach the Finals from that position. In the 2024-25 season, the Miami Heat became the first team ever to qualify for the playoffs after finishing tenth during the regular season, defeating the ninth-place Chicago Bulls 109-90 and the eighth-place Atlanta Hawks 123-114 in overtime.

• 6. Records Worth Knowing

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  Only six eighth-seeded teams have ever beaten a first seed. The Golden State Warriors in 2007 were the first to do it in a best-of-seven series, defeating the Dallas Mavericks 4-2. Before that, the Denver Nuggets accomplished it in 1994 against Seattle and the New York Knicks did it in 1999 against Miami, but those were best-of-five series. The 1998-99 Knicks and the 2022-23 Heat are the only eighth seeds to reach the Finals; none has won the championship as of 2025.

  At the other extreme, five teams have made the playoffs despite losing 50 or more games. The 1953 Baltimore Bullets qualified with a record of 16-54. Among all NBA championship teams, the 1977-78 Washington Bullets hold the lowest win total and winning percentage, finishing 44-38 and earning only the third seed. The 1994-95 Houston Rockets, seeded sixth with a 47-35 record, are the lowest-seeded team to win the championship. That run required the Rockets to defeat four teams that had each won at least 60 games during the regular season, making them the first team to accomplish that.

  The longest postseason winning streak in a single year belongs to the Golden State Warriors, who won 15 straight games during the 2017 playoffs. In that same postseason they finished 16-1, losing only in Game 4 of the Finals against Cleveland. The Boston Celtics hold 18 overall Finals series wins, having appeared in 23 with a record of 18-5.

• 7. Broadcast and the New Era

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  From 2003 through 2025, the NBA playoffs were split among ABC, ESPN, TNT, and NBA TV under a long-running set of rights agreements. ABC served as the exclusive broadcaster of the NBA Finals throughout that period. Starting with the 2026 playoffs, a new 11-year media deal took effect, adding NBC Sports and Amazon Prime Video as national partners alongside ABC and ESPN. Under the new arrangement, NBC carries between 22 and 34 first- and second-round games on broadcast television or via Peacock, while Amazon streams between 14 and 26 games in the same rounds. A significant structural change in the deal is that all first-round playoff games become exclusive to the national broadcast partners, ending the era when regional sports networks could televise early-round games alongside the national feed. For the conference finals, ABC and ESPN hold one series annually in the first ten years, with the other series rotating between NBC and Amazon. In 2036, the final year of the deal, NBC and Amazon will broadcast both conference finals instead of ABC and ESPN, while ABC continues to exclusively carry the Finals, a run that will extend the network's consecutive streak of airing the championship series to over 30 years.