Throughout the history of the National Basketball Association, a small number of individuals have faced permanent bans or long-term disqualifications due to severe violations of league rules, including involvement in game-fixing scandals, illegal substance policies, or egregious breaches of the player conduct code. Historic figures such as former players caught altering the outcomes of games or violating strict anti-drug agreements have been barred from participating in the league, ensuring the enforcement of competitive integrity and organizational trust.