The 20-year-old made his debut in Tuesday evening's 3-2 defeat at Spennymoor Town – and will remain at the Jakemans Community Stadium until January 7 initially.
Starbuck is the latest player to arrive on loan from Bramall Lane over recent times – following in the footsteps of Marcus Dewhurst, Kyron Gordon, Femi Seriki and Jean Leroy Belehouan.