Collect runnings now, boil later?

So usually it takes me about 5.5 - 6 hours to brew, but I've got a softball game (with beer of course) today in the middle of the day. Is it okay if I do my mash and collect all my runnings in the bucket now, then take a 3-4 hour break and boil it this evening? Any negatives?

The one problem with that is you may develop an infection during that time. Of course you would kill it off when you boiled but it might already have created a funk by then. It is actually one of the shortcuts to try to simulate a sour beer. If you are able to heat it just to pasteurize it before you leave it for a few hours and keep the lid on, then come back and do your boil you should be fine. Just bring it to a momentary boil, and it should take so long to cool that it will pasteurize it.