Defensive linemen are key players on a football team, positioned at the front of the defense. Their primary role is to stop the opposing team's offense by tackling the ball carrier or pressuring the quarterback. They typically line up on the line of scrimmage and can be categorized into two main types: defensive tackles and defensive ends. These players are usually larger and stronger than other positions, allowing them to effectively block offensive linemen. Defensive linemen must possess quickness and agility to navigate through blockers and disrupt plays. Their performance is crucial for a successful defense, as they help prevent the offense from gaining yards.