Defensive linemen are key players on a football team, positioned at the front line 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 directly across from the offensive linemen and use their strength and agility to break through blocks. There are different types of defensive linemen, including defensive tackles and defensive ends. Defensive tackles usually play in the middle of the line and focus on stopping runs, while defensive ends are positioned on the outside and often aim to sack the quarterback. Both positions are crucial for a strong defensive strategy.