Allowing for the detail that the balls would be somewhat warmer than 75 degrees F if they were pumped up, since a hand pump makes the air warmer as it compresses, I come out in the vicinity of 2 psi. Of course, it depends on indoor and outdoor temperatures too, air lost as the needle is removed, and variations among pressure gauges.
The Patriots and their Super Bowl wins should be treated the same way we think of Bonds, McGuire, and Clemons.
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An asterisk should be beside all of their wins.