This is the 6360th most frequent Russian word.
футболист
Football player.
Here, the word 'футболист' is used in its primary meaning to denote a professional or amateur player of football (soccer).
Футболист забил три гола в сегодняшнем матче.
The football player scored three goals in today's match.
In this sentence, 'футболистом' is the instrumental form, used to describe the profession a person aspires to.
Мой брат хочет стать футболистом, когда вырастет.
My brother wants to become a football player when he grows up.
This usage of 'футболист' also refers to a football player, emphasizing the context of a game or match.