Hall, the 2023 GA Cup Golden Boot winner, signed through the 2026 season that includes a club option for 2027.
Rosborough, who came to the Red Bulls from Pittsburgh's Beadling Soccer Club, was signed to an MLS Next Pro contract through the 2024 season. He will join the first team on a four-year MLS contract as a Homegrown player starting in 2025.
Hall and Rosborough scored three goals each at the 2023 Concacaf Under-15 Boys Championship at which the USA swept all six games. They both scored in the Red Bulls' 2-1 win over CF Montreal in the 2023 MLS Next Cup U-15 final.