Sacrifice - A ball batted by the batter that advances the runner to the next base while the batter records an out. Examples include the sacrifice fly and sacrifice bunt.

Safe - The notice that an umpire gives to the runner while the runner attempts to advance to the next base. If the runner is not safe, then the runner is out.

Score - The credit given to the offensive team after a runner navigates all four bases. Also known as a run.

Second Base - The base on the field that is the 2nd in the series of bases that an offensive player must traverse to score a run. It is guarded by the second baseman.

Second Baseman - The defensive position located at the right side of the infield between the first baseman and the shortstop. The second baseman is responsible for guarding second base.

Set Position - One of the two legal starting positions for the defensive pitcher before delivery of the baseball. Normally used to prevent offensive runners from getting a lead off of a base. See Wind Up Position.

Shortstop - The defensive position located at the left side of the infield between the second baseman and the third baseman.

Shutout - The defensive act of a pitcher(s) not allowing the offensive team to score a run. If the shutout did not allow a hit to the offensive team then the game is recorded as a no hitter. See No Hitter.

Signal - The strategic hand gestures given to the players on the field by the manager, coaches, or other players that advises the player what to do in certain situations. Some of the hand gestures have meaning while other gestures are done to confuse the opposing team. Hand gestures are coded signals which are only to be understood by members of that team. Coded signals are used by both the offense and defense. An offensive coded signal is relayed to the batter by the third base coach to advise the batter how to bat. A defensive coded signal is relayed from the dugout to the catcher to advise the catcher on how to pitch to the batter. The catcher uses coded signals to tell the pitcher which ball to throw during certain situations. Another kind of signal is one that is not coded but is hidden from the other team. An example of a hidden signal is when an infielder hides their facial expression behind the glove. The hidden facial expressions are utilized to inform the other infielders as to who will guard the base in case of a steal attempt by the offense.

Single - The batted ball that advances the offensive batter to first base.

Sinker - A ball thrown by the pitcher that has a sharp downward motion as it reaches home plate.

Slide - The act of an offensive runner dropping their body to the ground in an attempt to prevent the tag out from the defensive player. There are two basic forms of slides: a head first slide; and a foot first slide.

Slugging Percentage - The statistical information on an offensive batter that reflects the number of bases gained in reference to the number of hits.

Spit Ball - The illegal pitch thrown by a pitcher that involves the introduction of foreign substances on the ball such as saliva, oil, or grease.

Squeeze Play - The act of the offensive team when the runner on third base attempts to score while the batter attempts to bunt.

Stadium - The structure or area that encloses the baseball field and has seating for the spectators.

Steal - The act of the offensive runner advancing a base during the pitch without the assistance of a hit from the batter, a walk by the pitcher, or a balk called by the umpire. See Stolen Base.

Stolen Base - The statistical information on an offensive player that reflects the number of steals as a runner.

Strike - A pitch is a strike when called by the umpire if any of the following occur: (1) The pitch is swung at by the batter and is missed. (2) The pitch is not swung at and any part of the ball passes through any part of the strike zone. (3) The pitch is fouled by the batter when their is less than two strikes. (4) The pitch is bunted into foul territory with any number of strikes. (5) The pitch touches the batter as they swing. (6) The pitch touches the batter in flight in the strike zone. (7) The pitched is foul tipped into the catcher's glove.

Strike Out - The act of the offensive batter making an out while swinging and missing the third strike or while looking at the third strike cross into the strike zone without swinging.

Strike Zone - Is the area abover home plate that has an upper limit that is equal to a horizontal line at the midpoint between the top of the shoulders and the top of the pants, and the lower limit is equal to a line at the hollow beneath the knee caps. This zone shall be determined from the batter's stance as the batter is prepared to swing at a pitched ball.

Suicide Squeeze - The act of the offensive runner on third base attempting to steal home plate and score.

Swing - The offensive act of the batter attempting to hit the ball thrown by the pitcher. A ball that is swung at and missed is a strike.

Switch Hitter - An offensive batter that hits from either side of home plate.