Leo A. Seltzer (April 5, 1903 – January 30, 1978) is generally credited as the creator of the sport of roller derby, and was the founder and head of the original Roller Derby league from 1935 until his son Jerry Seltzer took over the business in 1958.
Seltzer was born in Helena, Montana on April 5, 1903.
Seltzer attended Lincoln High School in Portland, Oregon where he was a member of the school's basketball team. He competed in the amateur and semi-pro basketball circuits in Portland after high school.
As a young adult, Seltzer was in the motion picture distributing field with the Universal film company. This eventually led him to own a chain of struggling movie theaters in Oregon.
In 1929, after observing the popularity of cash prize-awarding dance marathons among out-of-work contestants and spectators, Seltzer sought ways to capitalize on the trend. In 1931, he helped organize and promote "walkathon"s, which at that time was another name for dance marathons, since most dancers ended up merely shuffling around for the duration of the contests, which could run as long as 40 days. His first commercial walkathon was held in Denver, Colorado, with twenty-two more to follow, including events at the Lotus Isle amusement park in Portland, Oregon. He grossed $2 million before retiring, citing that the events had become "vulgar."
Seltzer moved his family to Chicago in 1933, and began booking events into the Chicago Coliseum, a fortress-like structure at 15th & Wabash.
Sometime in early 1935, Leo read an article in Literary Digest magazine that said ninety-three percent of Americans roller skated at one time or another during their lives. Discussing the article with some of the regulars at Ricketts, a restaurant in Chicago's Near North Side, Seltzer was challenged to come up with a sport utilizing roller skating participants.