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.
College soccer
While similar in general appearance, NCAA rules diverge significantly from FIFA Laws of the Game. A manager may make limited substitutions, and each player is allowed one re-entry which must occur in the second half of the match unless the substitution was caused by a player injury resulting from a caution or send-off. All matches have an overtime period if the game remains tied after 90 minutes. As opposed to a regular two-half extra time period, golden goal is applied. If neither team scores in the two ten-minute periods, the match ends in a draw (unless it is a playoff match, then it would go to a penalty shootout). College soccer is played with a clock that can be stopped when signaled to by the referee for injuries, the issuing of cards, or when the referee believes a team is wasting time. The clock is also stopped after goals until play is restarted, and the clock generally counts down from 45:00 to 0:00 in each half. In most professional soccer leagues, there is an up-counting clock with the referee adding stoppage time to the end of each 45-minute half.