New England Patriots

[Subvet642]

If the balls were inflated and subsequently checked by the refs inside, then checked again outside, where it would be colder, then they would read lower because the air inside the ball would contract. If they were checked after the game, they would have time to get cold and beaten around a bit as well. If they're going to measure pressure it needs to be done at a standardized temperature if they want any kind of accuracy.