He was signed by the Dolphins after being spotted played junior reps with the Illawarra Steelers and for the NSW under-19 team.

[3] Bostock was contracted to the St. George Illawarra Dragons as a junior coming through the ranks, before signing with the Dolphins for their inaugural 2023 NRL season.

[4] On 1 April 2023 in round 5 of the 2023 NRL season, Bostock made his first grade debut in place of the injured Tesi Niu and played the full 80 minutes on the wing for the Dolphins in their 38−12 loss to the St. George Illawarra Dragons at WIN Stadium.

In round 4 of the 2024 NRL season, Bostock scored two tries for the Dolphins in their 30-14 victory over the Gold Coast.

Bostock played a total of 23 matches for the Dolphins in the 2024 NRL season and scored 14 tries as the club finished 10th on the table.