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.
American Ultimate Disc League
The field area is expanded to yards wide and 80 yards long with 20 yard end zones (the same size as an American football field, but with the end zones taking up twice as much of the field as in American football). Games are timed with four quarters of 12 minutes each, including a 15-minute halftime. If the score is tied, a five-minute overtime period is played. If the score remains tied after overtime, a second overtime is played in which the first team to score wins.