IBF Title Fixtures
The IBF was preceded by the United States Boxing Association (USBA), a regional championships organization like the NABF, NABC and NABA. In 1983, at the WBA's annual convention, held in Puerto Rico that year, Bob Lee, president of the USBA, lost in his bid to become WBA president against Gilberto Mendoza. Lee and others withdrew from the convention after the election, and decided to organize a new world-level organization.