Roller Derby The Mad Whirl 1950 Part 2
On November 29, 1948, before television viewership was widespread, Roller Derby debuted on New York television. The broadcasts increased spectator turnout for live matches. For the 1949–1950 season, Seltzer formed the National Roller Derby League (NRDL), comprising six teams. NRDL season playoffs sold-out Madison Square Garden for a week.