well, it same as FLAG football
semua tactic ada di tangan QB, American footbal juga itu dari QB, QB yang menentukan tactic yang ia inginkan supaya enak di lempar dll.
kalo flag football, cara untuk "mematikan" pemainya dengan melepaskan tali yang ada di pinggang, makanya FLAG football itu semacam american football tapi tidak bermain secara keras
liat di youtube fore more information
Quarterback: The Quarterback ("QB") lines up directly behind the center, where he takes the ball (in an action called the 'snap') and puts it into play. The quarterback's primary duty is either passing (throwing) the ball or handing the ball to a running back ("RB") who carries the ball downfield. "In some cases" the quarterback is called upon to run the ball downfield himself, either because the play is designed that way or the quarterback has no other options available. A quarterback can even act as a receiver, catching a pass thrown by another player during a "trick play." In most cases, the quarterback also communicates to the other players the play they are going to run, both in the huddle before the team lines up to execute the play and immediately before the ball snap. Quarterbacks must be able to throw the ball accurately, read defenses, and make quick, correct decisions. As the leader of the offense, the Quarterback is considered by many to be the most important player on the offensive field.