Who 
John Arthur Johnson (March 31, 1878 – June 10, 1946), nicknamed the Galveston Giant, was an American boxer who, at the height of the Jim Crow era, became the first African American world heavyweight boxing champion (1908–1915). Among the period's most dominant champions, Johnson remains a boxing legend, with his 1910 fight against James J. Jeffries dubbed the "fight of the century."[4]
In 1912, Johnson was arrested on charges of violating the Mann Act—forbidding one to transport a woman across state lines for "immoral purposes"—a racially motivated charge that embroiled him in controversy for his relationships, including marriages, with white women.[5] According to filmmaker Ken Burns, "for more than thirteen years, Jack Johnson was the most famous and the most notorious African-American on Earth".[6][7]