A South Sydney junior from the Redfern United Club,[3] Kadwell first played for the Rabbitohs in the first grade NSWRFL premiership in 1927. At the end of his first season he played at fullback in Souths' win over Western Suburbs in the grand final. The following year he was first selected in the New South Wales rugby league team and again won a premiership with Souths, this time playing at five-eighth and scoring two tries. In 1929 Kadwell moved to halfback and was selected in this position for the 1929–30 Kangaroo tour of Great Britain, becoming Kangaroo No. 163.[4] On the tour he played in eight matches, but no tests.[5] Following the residential qualification rules of the time, Kadwell was forced to leave Souths in 1930.
St. George
Kadwell became St. George's captain-coach for the 1931 NSWRFL season and was also the club's top point scorer in first grade. While representing New South Wales against England early in the 1932 season, Kadwell broke his leg.[6] ending his season and Arthur 'Snowy' Justice took over as St. George captain (and would later become coach and secretary of the club).
Kadwell returned in 1933 as St. George captain (with 'Ricketty' Johnston taking over as coach) to guide Saints to the 1933 premiership-deciding final, (lost 18–5 to Newtown) and was again the St. George club's top point-scorer.
He was again captain in the 1934 NSWRFL season, his final season, earning selection for New South Wales once more and was again the St. George club's top point-scorer.[7]
Post-playing career
After retirement, Kadwell helped the St. George club as a lower grade coach and selector. On 7 February 1945 he was selected by the club's committee to replace Bill Kelly as first-grade coach, although Percy Williams later shared the position.[8]
^"Player Profile". yesterdayshero.com.au. SmartPack International Pty Ltd. 2008. Archived from the original on 17 September 2009. Retrieved 8 July 2009.
^"Injured footballer". Canberra Times, The. Ainslie, A.C.T. : C.J. Shakespeare for the Federal Capital Press of Australia Ltd. 7 June 1932. p. 3. Retrieved 8 July 2009.