what happens when you bat out of order in mlb
Batting out of turn Occasionally, one or more batters may bat in the incorrect order. In Major League Baseball, this violates rule 6.01(a) of the Official Baseball Rules. Batting out of turn is ignored by rule unless a member of the defensive team notifies the umpire that an infraction has occurred. Once the umpire is notified, he enforces the rule based on the batting order he had received, which says that the batter is out.
Tag out A batter can also advance to the next base because he chooses to. For example, suppose, with a runner on first, the batter hits a groundball single into the outfield. As the batter runs to first, the runner on first is forced to advance ahead of him to second. However, that runner can then choose to run past second and on to third. In this situation, a defensive play against such an unforced runner will be called a tag play and, if successful, a tag out. To get the runner out on a tag play, the fielder must tag him with the ball before the runner gets to the targeted base. Tag plays are much more difficult to execute than force plays.[2]