Larry O'Brien was an influential American politician and sports executive, best known for his role as the Commissioner of the National Basketball Association (NBA) from 1975 to 1984. He played a significant part in the growth and popularity of professional basketball during this time, helping to establish the league as a major sports entity in the United States. Before his tenure in the NBA, O'Brien served as a key figure in the John F. Kennedy administration and was involved in various political activities. He was also the chairman of the Democratic National Committee, showcasing his impact on both sports and politics throughout his career.