"... the attitudes or stereotypes that affect our understanding, actions, and decisions in an unconscious manner."
Ever been at a work place where a certain client had a bad reputation and no one wanted to deal with them? What about a certain manager that knew how to sweet talk people in the lunch room and never seemed to get called on his **** whereas you stuff up once and it's the talk of the office? What about at school? Or society in general, rock up to ask for a refund wearing a suit and tie as opposed to a beanie and a skateboard and see what happens.
Bias is everywhere, it's life and people talk, we're only human. I don't think this is even all that unconscious. To think officials don't mention clubs, players or staff in the corridors is naive.
What's less likely, some bias (implicit or otherwise, based on perceiption and reputation, or even personal experiences)
Or its all coincidence?