In baseball, a runner must tag up if a batted ball is caught in flight. To tag up is to retouch the runner's time-of-pitch base after the ball is first touched. After a legal tag up, even if the ball was caught in foul territory, runners are free to attempt to advance. On long fly ball outs, runners can often gain a base; when a runner scores by these means, this is called a sacrifice fly. On short fly balls, runners seldom attempt to advance after tagging up. Baseball is a team sport, in which a fist-sized ball is thrown by a defensive player called a pitcher and hit by an offensive player called a batter with a round, smooth stick called a bat. ... In baseball, the time of pitch is that instant when the pitcher has begun his pitching motion and, by the rules, has committed himself to throwing the pitch. ... In baseball, a batted ball is considered a sacrifice fly (denoted by SF) if the following four criteria are met: There are fewer than two outs. ...

After a caught fly ball, if a fielder can touch the runner's time-of-pitch base or the runner with the ball before he tags up, the runner is out. This is considered an appeal play. This often occurs on infield line drives. Fielding in the sport of cricket is what fielders do to collect the ball when it is struck by the batsman in such a way as to either limit the number of runs that the batsman scores or get the batsman out by catching the ball or running the batsman... In baseball, an appeal play occurs when a member of the defensive team calls the attention of an umpire to an infraction which he would otherwise ignore. ... In baseball, a batted ball can be called one of several various things, depending on how it comes off the bat and where in the field it lands. ...