These days wingmen play much more a midfield type roll due to a much more contested game, unless you have that real running game like Hawthorn's Smith, or are super evasive/clever like our Edwards. Short is not a contesting player. But half backs can be average defensively if they have attacking qualities, like Houli. Short is only just starting his career as a defendere, so yes he isn't much of a defender, but he can improve on that, like Houli.He isn't a defender either.