It's not as easy as it sounds,
plus rules about the ball boys:
The referee "shall be the sole judge as to whether all balls offered for play comply with these specifications" and the balls "remain under the supervision of the Referee until they are delivered to the ball attendant just prior to the start of the game," according to Rule 2, Section 1.
A person with intimate knowledge of the process told USA TODAY Sports the ball attendant is a uniformed official – generally the same person each week at a given stadium – who comes to the locker room to pick up the balls and takes them to the officials' locker room for testing.
The
ball attendant delivers the balls to the
ball boys – usually
four provided by the home team and two traveling with the visiting team – who make sure their quarterback's preferred balls get into the game, said the person, who spoke on condition of anonymity because they weren't authorized to speak publicly.
At halftime, the balls return to the officials' locker room, the person said. So, if proper protocol is followed, the only opportunity to manipulate the balls is minutes before kickoff or during the game on the sideline, where there's a risk of anyone in the stadium and dozens of TV cameras seeing it.
Asked how long it takes to change and measure the pressure of a football, the person said, "Ten seconds. But if they were all exactly 2 pounds under? It would be almost impossible to get them exactly all the same weight or the same psi.
"That, or you'd have to be really good at knowing exactly where to pull the needle. And then what if you take too much out? How are you going to pump it back up on the field? You can't. You need a ball pump to do it. That's what's even more weird about it. Too many moving parts."
http://www.usatoday.com/story/sport...tballs-may-not-as-easy-as-it-sounds/22113343/