Ball four

[J. William]

In Fastpitch softball can base runners steal on a ball four pitch?

[beerguy55]

For the most part, yes.  Baseball too.  Ball four is live, just like ball one, two and three.   And the play is live when the batter advances to first...and if the defense is sleeping the batter/runner can advance to second if they want.

Unless ball four hit the batter - then it's a dead ball.  Or something else occurred on ball four that might kill the play (eg. Interference)

 

You MIGHT have some of the youngest learning levels in recreational settings where they kill the play on ball four, but I think that's rare.