Simplify the following text for a Grade 4 native English-speaking person.
Original: The team captain of a football team , sometimes known as the skipper , is a team member chosen to be the on-pitch leader of the team : it is often one of the older or more experienced members of the squad , or a player that can heavily influence a game .
Simplified: The team captain of a football team is a team member who is chosen to be the leader during a football match . Mostly a captain is an older or more experienced player .