This entry from Encyclopedia Brittanica's Guide to Black History features Sonny Liston, an American boxer who was world heavyweight boxing champion from September 25, 1962, when he knocked out Floyd Patterson in the first round in Chicago, until February 25, 1964, when he stopped fighting Cassius Clay (afterward Muhammad Ali) before the seventh round at Miami Beach, Florida. This site, rich in detail and breadth of coverage, includes a wealth of information on other notable African Americans, important events, and much more.