Jack Dempsey
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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 as tenth on The Ring magazine's list of all-time heavyweights and seventh among its Top 100 Greatest Punchers, while in 1950 the Associated Press voted him as the greatest fighter of the past 50 years. He is a member of the International Boxing Hall of Fame, and was inducted into The Ring's Boxing Hall of Fame in 1951.

Born William Harrison Dempsey in Manassa, Colorado, he grew up in a poor family in Colorado, West Virginia, and Utah. The son of Mary Celia (née Smoot) and Hiram Dempsey, his family's lineage consisted of Irish, Cherokee, and Jewish ancestry. Following his parents' conversion to Mormonism, Dempsey was baptized into the LDS Church in 1903 following his 8th birthday, the "age of accountability", according to Mormon doctrine. Because his father had difficulty finding work, the family traveled often and Dempsey dropped out of elementary school to work and left home at the age of 16. Due to his lack of money, he frequently traveled underneath trains and slept in hobo camps.