Running out the clock
In American football, each quarter of a game is measured with a 15-minute game clock, or 12-minute clock in many high school football codes and the German Football League. A team in possession of the lead and the ball will attempt to use up as much of the game clock as possible in order to bring the game to an end more quickly, thus denying the opposition another chance on offense.
RealSports Football
Each game is 15 minutes long and is played on a standard 100-yard football field. There are no kickoffs in the game, and each side is given five players. The team on the offensive side of the ball has a quarterback, a flanker, and three offensive linemen (a center and two guards); the user controls the one with the ball. The team on defense has two defensive linemen, two cornerbacks, and one linebacker, which the user controls.