Pitched ball bounces over backstop.

[josephrt1]

ASA says one base, but it does not state from what time point. For a thrown ball it clearly states 2 bases from runner's position at time ball left fielders hand and for loss of possession it says 1 base from time ball went out of play. But for pitched ball I don't see a starting point defined. Just an observation. I have always gone with 1 base from position at start of the pitch.