Rule 2 – Section 24 – OUT: FORCE-OUT, PUTOUT, STRIKEOUT, TAG OUT, THROW-OUT
2-24-1 A force-out is a putout during which a runner who is being forced to advance is tagged out, or is put out by a fielder who holds the ball while touching the base toward which the forced runner is advancing (9-1-1 for special case.)
2-24-2 A putout is the act of a fielder in retiring a batter or runner. For putouts credited to the catcher and to other fielders, see 9-5-2. An “out” is one of the three required retirements of players of the team at bat.
2-24-3 A strikeout is the result of the pitcher getting a third strike charged to a batter. This usually results in the batter being out, but does not so result if the third strike is not caught and the batter-runner legally reaches first base.
2-24-4 A tag out is the put out of a runner, including the batter-runner, who is not in contact with his base when touched with a live ball, or with the glove or hand when the live ball is held securely therein by a fielder. The ball is not considered as having been securely held if it is juggled or dropped after the touching, unless the runner deliberately knocks the ball from the hand of the fielder (8-4-2h2).
2-24-5 A throw out is a putout caused by a throw to first base to retire a batter-runner, or to any other base to which a runner is forced or is required to retouch.