1-2-3

From BR Bullpen

The term 1-2-3 or 1-2-3 inning refers to a half inning in which the pitcher gets the three batters out which he has faced.

1-2-3 could also refer to a double play in which the pitcher throws to the catcher for the first out and the catcher throws to the first baseman for the second out.

See also[edit]