Here is the bottom line....prior to kickoff the ref’s handle the balls from both sides. The ref’s would have 100% noticed if the Pats balls had been 2psi under-inflated. There is more to this story....
The “more” to this story is that sometime between the time the balls were tested before the game and the start of the game, only 11 of the balls the Patriots provided “magically” lost 15-20% of the air that was in them.
No such “magic” occurred with the balls the Seahawks provided.
There has to be a reason for this and in the next few days, the NFL will find out the reason.