Starting an event
With each pitch only 6 things can happen:
Key Button
---- --------
S 
The pitch was a strike
B 
The pitch was a ball
F 
The pitch was a foul
A 
The batter was safe at first
O 
The batter was out at first
R 
A play was made on a runner
You will typically use one of the above 6 buttons or key presses to start any event.