It's fair to say Callum Doyle's arrival at the Stadium of Light rose some eyebrows. The Black Cats had fallen at the League One play-off semi-final hurdle against Lincoln City and Lee Johnson was beginning his rebuild at the Stadium of Light.
There can be no denying that the Black Cats needed some younger legs in the squad, but there questions about how could a 17-year-old with no experience of senior football add quality to the squad. On paper, the signing looked a gamble, but it became clear from a very, very early stage that Doyle would be an astute signing.
Much like Dion Sanderson, Doyle played with an experienced head on young shoulders and showed no signs of fearing life in League One. The Manchester City loanee is one of the best ball-playing defenders at League One level and if he continues on the right trajectory, could be one of those young talents who breaks into Pep Guardiola's first team.
