Pitched ball stuck in backstop

Question
In an ASA game, pitcher pitches ball that gets past the catcher and gets stuck under the bottom of the backstop. Runner is already going to second on passed ball. Should the runner be awarded 2nd (last legally held base was 1st) or 3rd? Or no award at all, just the stolen base? And is it a dead ball if the ball is technically in the field of play but can't be retrieved?

The ump awarded 3rd but I always thought the award was based on when the ball left the fielder/pitcher's hand and was based on the last legally held base.

Thanks! Doug

Answer
Hi Doug,

This is ASA 8-5-C. (Fast Pitch and Slow Pitch with stealing) runners are entitled to advance w/out liability....  When a pitched ball that remains live becomes blocked or goes out of live ball territory.
EFFECT: The ball is dead and runners are awarded one base only. The
batter is awarded first base only on the fourth ball.

The award would be 2nd for R1.

mark