A defensive footballer is a player on the football team who is responsible for defending the goal from the opposing team. A SWEEPER is a type of defensive footballer who plays behind the other defenders and is responsible for sweeping up any loose balls. An END is a defensive footballer who lines up at the END of the line of scrimmage and is responsible for defending against the run and the pass. A fullback is a defensive footballer who lines up behind the quarterback and is responsible for blocking and protecting the quarterback from the opposing team.