The Quarterback is a members of the offensive team and lines up directly behind the offensive line. Quarterbacks are responsible for calling the play in the huddle. They either throw the ball to an open receiver or hand the ball off to a running back.
The Defensive Tackle is typically the largest and strongest of the defensive players. When teams don’t have a nose tackle, the defensive tackle typically lines up opposite one of the offensive guards. Depending on a team’s individual defensive scheme, a defensive tackle may be called upon to fill several different roles. These roles may include merely holding the point of attack by refusing to be moved, or penetrating a certain gap between offensive linemen to break up a play in the opponent’s backfield. If a defensive tackle reads a pass play, his primary responsibility is to pursue the quarterback, or simply knock the pass down at the line if it’s within arm’s reach. Other responsibilities of the defensive tackle may be to pursue the screen pass or drop into coverage in a zone blitz scheme. In a traditional 4-3 defensive set, there is no nose tackle. Instead there is a left and right defensive tackle. Some teams. like he Cowboys have a nose tackle in this scheme.
The Center’s first and primary role is to pass the football to the quarterback. This exchange is called a snap. Most offensive schemes make adjustments based on how the defensive line and linebackers align itself to the offensive line, and what gaps they line up in. Because the center has an ideal view of the defensive formation before the snap, he typically makes the first line call. This call is typically based on the position of the defensive linemen or linebackers in his gaps (0i-1i), most subsequent adjustments are dependent on this call. In some cases the center may call an adjustment for the entire offensive line. After the snap, the center blocks the defensive player opposite him.
The Offensive Tackle is a position of the offensive line, left and right. Like other offensive linemen, their job is to block: to physically keep defenders away from the offensive player who has the football. The term “tackle” is a vestige of an earlier era of football, in which the same players played both offense and defense. A tackle is the strong position on the offensive line. They power their blocks with quick steps and maneuverability. The tackles are mostly in charge of the outside protection. If the tight end goes out for a pass, the tackle must cover everyone that his guard doesn’t, plus whoever the tight end isn’t covering. Usually they defend against defensive ends
The Long Snapper refers to a player who is a specialized center during punts, field goals, and extra point attempts. His job is to snap the ball as quickly and accurately as possible. If he’s good at his job, you prorbaly won’t know his name. If he’s not d good at his job, everyone knows his name.
The Punter is a special teams player who receives the snapped ball directly from the line of scrimmage and then punts (kicks) the football to the opposing team so as to limit any field position advantage. A punter must be skilled in angling the football and/or kicking it as high as possible (called “hangtime”) to maximize his teammates’ ability to eliminate a punt returner’s forward progress. Also, the punter will try to make the ball spin in an unusual manner making it harder to catch, which could result in a muff and potentially lead to the punter’s team gaining possession.