In just his sixth VFL game, Broadstock became a premiership player when he was the centreman in Richmond's winning 1943 VFL Grand Final team. He played finals football again the following season and kicked three goals in a Semi Final loss to Fitzroy, but was suspended for eight weeks for hacking.[4]
Broadstock had started his career at West Adelaide in 1938 and returned there in 1947. He missed out on playing in their premiership side that year when he was suspended the week before for hacking at Port Adelaide ruckman Bob McLean.[5]
He captain-coached Boulder City to a Goldfields National Football League premiership in 1948, having spent the first half of the season unavailable to play due to residential qualification requirements and a tribunal suspension that was imposed the previous season in Adelaide.[6] Broadstock returned to West Torrens the following season[7] and was a losing Grand Finalist. Back at West Adelaide in 1950, he was captain coach for the year before announcing his retirement.
^"Boulder's New Coach". Kalgoorlie Miner. Vol. 54, no. 13, 258. Western Australia. 17 April 1948. p. 5. Retrieved 20 January 2021 – via National Library of Australia.
^"News of Jack Broadstock". Kalgoorlie Miner. Vol. 55, no. 14, 473. Western Australia. 25 April 1949. p. 6. Retrieved 20 January 2021 – via National Library of Australia.
Holmesby, Russell and Main, Jim (2007). The Encyclopedia of AFL Footballers. 7th ed. Melbourne: Bas Publishing.
