1907-For every such fairly delivered ball, the umpire shall call one strike.
For every unfairly delivered ball the umpire shall call one ball.
19C棒球歷史館網站中的:
1872
"Unfair" balls are identified as any ball that is delivered over the striker's head, hit the ground in front of home base, delivered to the opposite side that the batter strikes from or come within one foot of the batter. These types of pitches are required to be called in the order they are delivered after the first ball is pitched.