As a rough estimate - If the short axes of the ball expand as little as 1/10 of an inch from the smallest legal dimensions, assuming an ellipse, thatd be another .35 PSI drop, yes?
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Good estimate if the rubber was totally soaked but I expect that it is not.
I would expect the rubber to be waterproof. :-P
The allowable change in an NFL football is 1/4” in all dimensions.
I figured 1/10” was reasonably conservative for looking at what could happen. As Leaning Right suggested, that is probably one of those things to be tested.
...and it was really pouring.
“The allowable change in an NFL football is 1/4 in all dimensions.”
That is not in the rule book that I can find. Is it a Wilson spec?