The 1975–76 Phoenix Suns season was the eighth season for the Phoenix Suns of the National Basketball Association. The season included an improbable run to the NBA Finals by a team that had never won a playoff series and made the playoffs only one other season in the franchise's existence. With a regular season record of 42–40, the Suns had finished third in the Pacific division standings and improved upon last season's win total by 10 games. The ensuing playoff run took plenty by surprise, including a seven-game series win against the Western Conference's top seed Golden State Warriors, a team that had finished 17 games ahead of the Suns in the divisional standings. The franchise's first Finals appearance pitted them against a 12-time champion in the Boston Celtics, whose roster featured three players from that season's All-Star Game. The 1976 NBA Finals would feature a memorable Game 5 triple-overtime thriller filled with controversies in which the Suns narrowly lost. Returning home for Game 6, the demoralized Suns would lose Game 6 and the series but not before endearing a generation of fans to the Suns franchise and showcasing a basketball from the desert southwest. The team's "Cinderella" season earned them the nickname Sunderella Suns.John MacLeod was head coach and the Suns played their home games at Arizona Veterans Memorial Coliseum.

Finishing the previous season with a 32–50 record, the Suns earned the fourth pick in the draft, which they used to select center Alvan Adams from Oklahoma. Adams averaged 23.4 points and 12.8 rebounds per game in three seasons with the Sooners. With averages of 19 points, 9.1 rebounds, 5.6 assists, 1.5 steals, and 1.5 blocks a game, Adams would become an All-Star in his first NBA season, and go on to be named Rookie of the Year. Adams would spend his entire 13-year career with the Suns, and would have his #33 jersey retired by the franchise in 1988.

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