A tall centre-back, Mark enters his first season as a scholar having already made his debut for the U18s last campaign in the 3-0 victory over Brighton & Hove Albion.
An England youth international who is also eligible to represent Northern Ireland, Mark was part of the Arsenal squad that won the Future Cup in Holland in 2016.
Mark will hope to gain much playing time for the U18s this season.
Name Mark McGuinness
U18 apps 1
Signed scholarship Summer 2017