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.
Leotis Martin Leotis Martin (March 10, 1939 – November 20, 1995) was an American boxer, the first ever NABF heavyweight champion and best known for his victory over former heavyweight champion Sonny Liston. Martin was a good puncher and a fairly skilled heavyweight who fought from 1962 to 1969. He compiled a record of 31 wins (19 KOs) and 5 losses and in 2003 was named to the "The Ring"' s list of 100 greatest punchers of all time. His career, however, was marked by inconsistency and bad luck.