My opinion is proofed dough should be used same day. However, I have no factual evidence this is truth. Did some google searching and found it difficult to find any real information on storing proofed dough... I did find this informative article on the shelf life of pre-proofed pizza doughhttp://slice.seriouseats.com/archives/2010/09/the-pizza-lab-how-long-should-i-let-my-dough-cold-ferment.htmlTheir recommendation is 3-5 for homemade dough. With store bought dough I've stretched that as far as 1 week in the fridge. I've yet to freeze any homemade dough, I do however freeze Trader Joe's pizza dough for upwards of 3 months with no issue.