The 1983 NBA World Championship Series, also known as Showdown '83, was the championship round of the National Basketball Association (NBA)'s 1982–83 season, and the culmination of the season's playoffs. It was the last NBA Championship Series completed before June 1. The Eastern Conference champion Philadelphia 76ers defeated the Western Conference champion Los Angeles Lakers four games to zero to win their third NBA championship. After their previous four final meetings, they beat the Lakers for the first time in NBA Finals history. 76ers center Moses Malone was named the NBA Finals Most Valuable Player (MVP). This, along with the 1989 NBA Finals, were the only two NBA championships of the 1980s not to be won by either the Lakers or the Boston Celtics; every NBA Finals of that decade featured either the Lakers or Celtics, and sometimes both (1984, 1985, 1987). Coincidentally, the Lakers were also swept in the 1989 NBA Finals, that time by the Detroit Pistons.

The final piece of the Philadelphia 76ers' championship puzzle was completed before the 1982–83 season when they acquired center Moses Malone from the Houston Rockets. They went on to capture their third NBA championship as they won 65 games, and stormed through the playoffs, first sweeping the New York Knicks, and then beating the Milwaukee Bucks in five games. They finally finished it off with a four-game sweep of the Los Angeles Lakers, who had defeated them the season before.

Said head coach Billy Cunningham, "The difference from last year was Moses." Malone was named MVP of the 1983 Finals, as well as league MVP for the third time in his career. The 76ers completed one of the most dominating playoff runs in league history with a 12–1 mark after league and NBA Finals MVP Moses promised "Fo', fo', fo" (as in "four, four, four"—four wins to win round 1, four wins to win round 2, etc.), but it actually wound up as "Fo', fi', fo." (four, five, four). The 76ers were also led by Julius Erving, Maurice Cheeks, Andrew Toney, and Bobby Jones.

With 59 seconds to go in Game 4, it was Erving who made a three-point play to hold the lead for good, crushing the Lakers in a four-game sweep and ending the last NBA Finals to end before June.

Until the Phillies won the 2008 World Series over the Tampa Bay Rays 4-1, this was the last time a team from Philadelphia in the Big Four leagues won their league's championship.

Philadelphia 76ers

Los Angeles Lakers

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The 1983 NBA Finals was broadcast by CBS. Dick Stockton and Bill Russell were the commentators and Brent Musburger was the host, with Kevin Loughery as a pre-game, halftime and post-game analyst. It also introduced a new theme music (composed by Allyson Bellink) for the CBS Sports coverage of the NBA, used an introduction of the NBA arenas (similar to the Boston Garden) until the 1989 Playoffs and later revived the second theme beginning in the 1989 Finals.^[2]

Russell departed CBS following the series, and was replaced by former Celtics teammate Tom Heinsohn. Russell would later resurface as a color analyst on TBS until 1986.

• 76ers–Lakers rivalry
• 1983 NBA Playoffs