Tim Witherspoon is an American former professional boxer who competed from 1979 to 2003. He was a two-time world heavyweight champion, having held the WBC title in 1984, and the WBA title in 1986. He beat heavyweight world champions Greg Page, James Smith, Tony Tubbs, Frank Bruno and cruiserweight world champions Alfonzo Ratliff and Al Cole. He is famous for his fight against undefeated heavyweight world champion Larry Holmes in which he lost by split decision. Witherspoon also worked as a regular sparring partner for Muhammad Ali. World heavyweight champion (WBA) from January 17, 1986 to December 12, 1986. Wiki link