Habeeb Ogunneye made Manchester United's bench for last night's FA Cup win at Wolves.
It was the 18 year-old's first involvement with the senior team.
Primarily a right-back, Ogunneye has been a regular with the U21s this season.
The London-born defender was joined on the bench by fellow youngsters Toby Collyer, 20, Kobbie Mainoo (18), Omari Forson (19), Willy Kambwala (19) and Amad Diallo (21).