A linebacker is a key defensive position in American football. Positioned behind the defensive linemen, linebackers are responsible for stopping the opposing team's running plays and covering receivers during passing plays. They must be versatile, combining speed, strength, and tactical awareness to read the offense and react quickly. Linebackers can be categorized into different types, such as middle linebackers and outside linebackers. The middle linebacker often leads the defense and calls plays, while outside linebackers typically focus on edge rushing or pass coverage. Their role is crucial for a team's defensive strategy and overall success on the field.