Boro duo Jack Hannah and Ben Beals are set to gain more experience after moving out on short-term youth loans.
Jack has joined National League North side Darlington while Ben has joined Northern Premier League side Marske.
Hailing from Stockton, 20-year-old Jack spent the summer with Michael Carrick's squad and he was an ever present in the Under-21s this season, recently wearing the captain's armband.
Ben, 19, has been Jack's regular central defensive partner in the U21s this term and also been with the club's Academy for over a decade.
Ben is the second player to join Marske on a short-term basis this season with goalkeeper Nathan Fisher having spent time with the club last month.