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.

Position (Offensive)

The positions of players in football depend on whether a team is defense or offense. The job of the offensive line is to collectively protect the Quarterback from the players on the opposing team's defense. As soon as the Center hands the ball off, the defense is going to try to tackle the Quarterback before he can make a play. Without any protection, the offense is not going to have much success scoring any points.

Following are the offensive positions in football.

Center

The player in center position has the function of hiking (or snaps) the ball to the quarterback at the start of each play. The center lines up in the middle of the offensive line, between the offensive guards. He will also try to protect the quarterback from the opposing team’s defense.

Offensive guard

This position has two players on every play, and they line up on either side of the offensive center. Their primary task is to top both passing and running plays.

Offensive tackle

There are two tackles on every play, and they line up on the outside of the offensive guards. Their primary task is to block the opposing team from tackling the quarterback, and open up areas for the running back to get through.

Tight end

Tight end is an offensive player who serves as a receiver and also a blocker. The tight end lines up beside the offensive tackle either to the right or to the left of the quarterback. There are types of tight end which are the flanker lines and split end lines.

Wide receiver

Players in this position are speedy pass-catching experts and their primary task is to receive the ball on a passing play.

Full Back

The players here are positioned behind the quarterback and their job is to block the halfback. Fullbacks are usually bigger than halfbacks, and also serve as short-yardage runners.

Halfback
An offensive player who lines up in the backfield and generally is responsible for carrying the ball on run plays. A running back's primary role is to run with the football, he is also used as a receiver at times which they usually will try to catch the short passes when necessary.

Quarterback
The quarterback is the offensive leader. It is his job to call the plays, and execute them. Quaterback will receives the ball from the center at the start of each play before either handing it to the running back, throwing it to a receiver, or running with it himself. The quarterback can also seize the opportunity to run the ball himself if the play or the situation calls for it.