The batter is out when: with two strikes, he swings at a pitched ball and misses; with two strikes, he does not swing at a pitch that the umpire judges to be in the strike zone (and the catcher catches the ball and does not drop it); with two strikes, he foul tips a pitch directly back into the catcher 's mitt, and the catcher holds the ball and does not drop it; with two strikes, he bunts a pitch into foul territory; the third strike is pitched and caught in flight; on any third strike, if a baserunner is on first and there are fewer than two outs; he is hit by his own fair ball, outside the batter 's box, before the ball is played by a fielder; he commits interference; he fails to bat in his proper turn and is discovered in an appeal; he hits a pitch while one foot is entirely outside the batter 's box; he steps from one batter 's box to the other when the pitcher is ready to pitch; or he is found to have used an altered bat. The batter - runner is out when: a fielder with a live ball in his possession touches first base or tags the batter - runner before the batter - runner reaches first base (except when the batter is awarded first base, such as on a base on balls); a batted ball is caught in flight (fly out); or he hits an infield popup while the infield fly rule applies; a fielder intentionally drops a line drive with fewer than two outs in a force situation (man on first, men on first and second, men on first and third, bases loaded) in an attempt to create a double play; a preceding runner interferes with a fielder trying to complete a double play on the batter - runner; the batter - runner does not return directly to first base after overrunning the bag and he is tagged with the ball by a fielder. Any baserunner, other than the batter - runner, is out when: he is forced out; that is, he fails to reach his force base before a fielder with a live ball touches that base; a fielder catches a batted ball in flight, and subsequently, some fielder with a live ball in possession touches the runner 's time of pitch base before the runner tags up (appeal play); while he is attempting to reach home plate with fewer than two outs, the batter interferes with a fielder and such action hinders a potential tag out near home plate; he is found to have committed a mockery of the game, for example a stolen base of first from second; he is found to be an illegal substitute. Any baserunner, including the batter - runner, is out when: he is tagged out; that is, touched by a fielder 's hand holding a live ball while in jeopardy, such as while not touching a base; he passes a base without touching it and a member of the defensive team properly executes a live ball appeal; he commits interference, such as when he contacts a fielder playing a batted ball, or when he contacts a live batted ball before it passes a fielder other than the pitcher; he strays more than three feet (. 91 meters) from his running baseline in attempting to avoid a tag; he passes a preceding runner who is not out; he is touched by a fair ball in fair territory before the ball has touched or passed an infielder. The ball is dead and no runner may score, nor runners advance, except runners forced to advance. EXCEPTION: If a runner is touching his base when touched by an Infield Fly, he is not out, although the batter is out; he intentionally abandons his effort to run the bases; or he runs the bases in reverse order in an attempt to confuse the defense or to make a travesty of the game.
how far can you run off the baseline in baseball
three feet (. 91 meters)