By rule there is no limit.
13
I believe it refers to "Walks" plus "Hits" per inning. Add the total number of Walks and the total number of Hits allowed by a pitcher, then divide by the total number of innings he pitched, and you get WHP.
In baseball, three outs are needed to end an inning.
Six, three for each side constitues one full inning in baseball.
3 outs
there is no mercy rule in the MLB. in Junior High baseball it is the 5 inning. It is also the 5 inning for high school
There are 9 regulation inning in baseball.
touchdown
It is the last inning of the game and what can be the outcome of a game.
Six outs can be recorded in one inning in a baseball game.
7th known as the Seventh inning stretch
It is the last inning of a game and it determines the outcome of a game.