A defensive player in basketball is a player on the basketball team that is currently on the defensive side of the ball. In basketball, all players will alternate between offense and defense on every possession, so each player will be a defender at some point in the game. Defensive players on the basketball court are supposed to play fundamentally sound defense with the goal of stopping the opposing team from scoring.
Defense in basketball can be run in a man to man formation or in a variety of different zone defensive sets. Defenders should utilize a proper defensive stance, keep track of the player(s) they are guarding, and always know where the ball is located. They should also be ready to help their teammates on defense, rebound, and box out. Some basketball players will consider themselves "defensive players" because they are more defensive-minded and consider themselves better players on defense than on offense.