The PFA is the Professional Footballers' Association: a trade union in the United Kingdom for people who play football for a living. It speaks for players in talks about pay, contracts, injuries, and what happens when a career ends. You will see the letters in British sports news — “the PFA said…” — the way a union is named when workers need a voice. It is not a club and not a league; it does not pick the team. It is the players’ own organisation. The same three letters can mean quite different things in other fields (science, money, and so on), so you only read PFA this way when the topic is British professional football.