The Fish That Saved Pittsburgh (1979) Directed by Gilbert Moses III

From Wikipedia: The Fish That Saved Pittsburgh tells the story of a struggling professional basketball team, The Pittsburgh Pythons, whose continuous losing streak and lack of talent has made them the laughing stock of Pittsburgh. This results in several players asking to go elsewhere in the league, except for the star player Moses Guthrie (Julius Erving), mostly because he is the highest paid player on the team and is not liked by the teammates.

Sensing that the team really needs a miracle, the team’s ball and waterboy Tyrone Millman (James Bond III) decides to turn to his favorite hobby, astrology, as a way to turn around the team’s fortunes. He brings his idea to an astrologer named Mona Mondieu (Stockard Channing), and they come up with the perfect concept: A team composed of players who were born under the astrological sign of Pisces (matching the star sign of Moses Guthrie), thus the ‘birth’ of “The Pittsburgh Pisces!”

The movie has attracted an unlikely cult following to this day, most notably for its disco-inspired decor/setting and soundtrack that was infused into the film, as well as the appearances of many NBA stars (including lead actor Julius Erving) and the rising careers of Debbie Allen and Harry Shearer.