This is one of the changes the NCAA introduced for the 2014 season. Two footballs will be used in each game now. One is the "live" ball and one is a decoy. It's up to the defense to figure out which is which.
That would be the Spurrier rule, only for Alabama because Alabama has the greatest collection of talent ever assembled, they are allowed to use 2 footballs to enable as many skill players to participate as possible. I think the NFL pushed for this rule as well so NFL teams would have enough game film on Bama players for evaluation.
BTW, I am not suggesting TJ is Shula'ing the weight room, it is the baggy shorts he is wearing.