In baseball, the umpires are responsible for making the calls in a game as they pertain to the rulebook. But sometimes, they make mistakes. The managers of each team can make an appeal to the umpire if they believe the call was incorrect.
Some lesser common appeal plays include:
He is called out.
A run is scored during the play that the appeal is being requested for.
The run is discounted.
The runner is called out.
The runner fails to touch home base when scoring a run and the fielder tags the base.
The runner is out on appeal.
Two runners reach home plate at nearly the same time and the first runner didn't touch the plate.
The second runners run will not count.
A batter bats out of order in the lineup and an appeal is made.
The batter will be called out and any score or advance will be discounted.
The batting order is assumed to be correct going forward.
An appeal must be made before the next pitch and play. Defensive teams can make appeals either verbally or by making an action that clearly shows they would like to appeal, usually by pointing at a location where a rule was broken. Teams can not make multiple appeals in a row on the runner at the same base.