He began playing rugby at Knox Grammar School.
[7][8] Frost made his debut for the Brumbies in February 2020 and went on to a total of 8 appearances that year.
He continued to be a mainstay in the Brumbies in the subsequent years, making 42 more appearances in the 2021-2023 Super Rugby seasons.
[12] In August 2023 Frost was named in the Wallabies squad for the 2023 Rugby World Cup.
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