A 6'7" center who grew up in Milwaukee, Wisconsin, Dancker began his professional career in 1938 with the Sheboygan Red Skins of the National Basketball League (NBL). He averaged 7.8 points per game and served as the team captain. In his last NBL season, 1948–1949, Dancker played for the Oshkosh All-Stars. Dancker was a five-time NBL all-star and ranked fourth among all-time NBL scoring leaders.
- All-NBL First Team (1943, 1944, 1946)
- All-NBL Second Team (1942, 1945)
- "United States Social Security Death Index," Edward C Dancker, 1991". Family Search. Retrieved 27 June 2012.
- McGlynn, Stoney (2 December 1945). "The Sports Parade". The Milwaukee Sentinel. Retrieved 27 June 2012.
- Dimitry, Steve. "National Basketball League (1937-1949)". Archived from the original on August 18, 2005. Retrieved 27 June 2012.
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