The origin of the alley-oop is debated among basketball historians. Some say Bill Russell’s putback dunks that forced the NBA to make an offensive goaltending rule were the first. Others point to Bill Walton at UCLA, or the Tucker brothers at Oklahoma Baptist in the 60s. Magic Johnson perfected and popularized the play at Michigan State after the NCAA got rid of draconian anti-dunking regulations.
Perhaps the most entertaining origin story of one of basketball’s most exciting plays is from Will Ferrell’s ABA inspired comedy Semi-Pro. Divine inspiration strikes, and Jackie Moon throws a lob to Coffee Black for the dunk, causing confusion and disbelief among all who watched it.