In baseball, a sacrifice fly (sometimes abbreviated to sac fly) is defined by Rule 9.08(d):"Score a sacrifice fly when, before two are out, the batter hits a ball in flight handled by an outfielder or an infielder running in the outfield in fair or foul territory that
is caught, and a run scores after the catch, oris dropped, and a runner scores, if in the scorer's judgment the runner could have scored after the catch had the fly ball been caught."
It is called a "sacrifice" fly because the batter allows a teammate to score a run, while sacrificing his own ability to do so. Sacrifice flies are traditionally recorded in box scores with the designation "SF".
