Lamar Hunt, American businessman, co-founded the American Football League and World Championship Tennis (died 2006)

Lamar Hunt Sr. was an American businessman most notable for his promotion of football, soccer, and tennis in the United States. With his brothers, he also attempted to corner the silver market.

The American Football League (AFL) was a major professional American football league that operated for ten seasons from 1960 until 1970, when it merged with the older National Football League (NFL), and became the American Football Conference. The upstart AFL operated in direct competition with the more established NFL throughout its existence. It was more successful than earlier rivals to the NFL, including not only the organizations founded in 1926, 1936, and 1940, respectively, under the AFL name, but also the later All-America Football Conference, which existed between 1944 and 1950, but conducted operations only between 1946 and 1949.

World Championship Tennis (WCT) was one of the principal organizing bodies of men's professional tennis headquartered at the WCT Lakeway World of Tennis facility, Austin, Texas, United States from 1968 to 1989. It administered the WCT Circuit a world wide tour of associated tennis tournaments that was a rival tour to the ITF Grand Prix Circuit both of which were replaced by the Association of Tennis Professionals ATP Tour in 1990.