My reckoning is the 'Occam's razor' theory ... someone simply got access to the footballs at some time and stuck a pin in 11 of them for about 3-5 seconds each. 2 minutes in total and it's done.
I'm thinking the footballs were probably unattended at some stage ... either that or the footballs weren't checked properly (initially) and were all set 2lbs lighter (except for one of them) Or they were somehow switched.
The answer will almost certainly be a perfectly logical one but someone probably has to 'talk' for that to happen. Regardless, they'll get done for governance issues you'd reckon.
For us here in oz, if a footy is ever over inflated, it doesn't take long to get enough air out so it's just right ... just a few seconds will do it.
This incident is going to be very difficult to explain away ... here's the full Tom Brady press conference ...
https://www.youtube.com/watch?v=HD7i5hQYHZs
Edited by Macca