Career
Frank Sponberg had a very successful club career, ultimately winning three grand finals with two different clubs. A Canterbury junior, Frank Sponberg played for the Western Suburbs Magpies for three seasons between 1932-1934. He played lock in the 1934 Grand Final winning Western Suburbs Magpies team as a late inclusion.
He joined the new Canterbury-Bankstown Bulldogs club for their debut season in 1935.
He played a total of 8 seasons with Canterbury between 1935-1944, including the 1938 Grand Final and the 1942 Grand Final. He spent the 1940 season as captain-coach of Wollongong, before returning to Canterbury in 1941.
Frank Sponberg represented New South Wales on 7 occasions between 1933-1935. He missed 1936 selection due to broken ribs.