Jack Dempsey was a famous Boxer in 1920. He was known as "Manassa Mauler." He was the heavyweight boxing champion from 1919-1926. He was born in Manassa, Colorado where he got his nickname. He fought a man named Jesse Willard, nicknamed "The Great White Hope" standing 6'6 and weighing 245 in 1919. He beat him despite his 6'1 stature and weighing 187 lbs.