What happens if a base runner attempts a steal right before the pitch, then the batter hits a foul ball? What is the cut-off as far as telling what base a player should be on after a foul ball?
There is no cut-off. If it is a foul ball, the ball is dead and the runners return to their base. This is covered under Rule 5.06(c)(5) of the 2016 MLB Rule Book.
The ball becomes dead and runners advance one base, or return to their
bases, without liability to be put out, when:
- A foul ball is not caught, in which case runners return to their bases.
If a foul ball is caught, the runner must return to his base (ie, retouch) or is at risk of becoming out. This is covered under Rule 5.09(b)(5).
Any runner is out when:
- He fails to retouch his base after a fair or foul ball is legally caught before he, or his base, is tagged by a fielder.
Since the ball is dead, I would assume the base would not get stolen.