Jack Dempsey Jack Dempsey William Harrison "Jack" Dempsey (June 24, 1895 – May 31, 1983), nicknamed "Kid Blackie" and "The Manassa Mauler", was an American professional boxer who competed from 1914 to 1927, and reigned as the world heavyweight champion from 1919 to 1926. A cultural icon of the 1920s, Dempsey's aggressive fighting style and exceptional punching power made him one of the most popular boxers in history. Many of his fights set financial and attendance records, including the first million-dollar gate. Dempsey is ranked tenth on "The Ring" magazine's list of all-time heavyweights and seventh among its Top 100 Greatest Punchers,
Mike Williams (boxer) Mike Williams (boxer) Michael Anthony Williams (born June 16, 1962) is an American actor and former professional boxer who competed from 1984 to 2000. He is most notable for portraying fictional boxer Union Cane in the 1990 film "Rocky V". Known as "Mercury," Williams turned pro in 1984 and was considered a rising prospect after winning his first 13 fights, including a win over James Tillis. In 1987 he stepped up and lost a split decision to former champion Tim Witherspoon. The following year he lost by TKO to Buster Douglas. In the 1990s he lost to other notable heavyweights