Rained out

Today was supposed to be the first day of the fall softball season. Unfortunately, the 'fall' weather has turned out to be more like 'autumn' and it's been pissing it down all day, so we were informed that the match was 'rained out'. Out? Out where? Cricket gets rained off. Which makes much more sense.

I have asked my team captain for the etymology of the term, but have yet to receive a reply...