Russian former professional boxer Nikolai Valuev first won in 2005 the heavyweight champion title from this American former professional boxer of which ethnicity?
John Ruiz John Ruiz (born January 4, 1972) is an American former professional boxer who competed from 1992 to 2010. He held the WBA heavyweight twice between 2001 and 2005, and is the first Latino boxer to win a world heavyweight title.
Donald Curry Donald Curry (born Donald Sample; September 7, 1961) is an American former professional boxer who competed from 1980 to 1991, and in 1997. He held the undisputed welterweight title from 1985 to 1986; the WBC super welterweight title from 1988 to 1989; and challenged once for the IBF and lineal middleweight titles in 1990.