Position (defensive)

Defensive Lineman

Defensive linemen, linebackers, and defensive backs make up a club's defense. Depending on the defensive coordinator's inclination, a team will use either four linemen and three linebackers, or the reverse.

Since there are usually fewer players on the defensive line than on the offensive line, a player at a different defensive position will oftentimes get involved in the trenches as well. Without a defensive line to put pressure on the Quarterback, it would be much easier for him to make a play and score more points.

Following are the defensive football positions.

Defensive Tackle

Defensive player are located on the inside of the usual four man line up for the defense. The duties of a defensive tackle include stopping the running back on running plays, getting pressure up the middle on passing plays, and occupying blockers so the linebackers can roam free.

Defensive Ends.

Defensive end: Two players are placed in position and their responsibility is to break through the offensive line in order to tackle the quarter back when he is planning to pass, or tackle the running back if it is passed to him. They are placed on opposite edges of defensive line.

Linebacker
Linebacker is a defensive player who lines up behind the defensive linemen and in front of the defensive backfield. The linebackers are a team's second line of defense. Each team has two outside linebackers. They are responsible for any running back that gets pas the defensive ends or tackles. They also cover short passes made over that defensive line

Cornerback

Cornerback is a defensive back who generally lines up on the outside of the formation and their main task is to prevent successful passes. They accomplish this task by throwing the ball away from receivers or else by catching ball by themselves.

Safety
Safety is a defensive back who lines up in the secondary between, but generally deeper than the cornerbacks. Players in this position are placed at the last. They mainly assist cornerback with large pass coverage.