Dad Davey says Adam has since turned his career around.
Davey - the biggest influence on Adam's career - told the Daily Mail: "When he moved to Manchester he was just dazzled by the bright lights and, yes, I suppose he got drawn into things he shouldn't. He liked a drink and he liked going out.
"At City, Brian Marwood had to have a word with him about it and after a while he calmed it all down. It was just the first few months really. By the back end of his time at City, Brian told me that they hadn't heard a peep from Adam and that was good.
"Now he is back in the North East he is certainly living a much quieter life. Sunderland is a lot different to Manchester. He doesn't go out that much and has worked out that the football has to come first in every way."