Sort of curious - how could they bring Dez back, as far as the salary cap rules? He was owed a boatload of money, by releasing him the team saved money.
So what would prevent any team, that had a player with a high salary cap hit from just releasing them and re-signing them for less money? Would be a very convenient way to reduce your cap hit, and it's hard to see the NFL allowing that. There would be no way to know if the player really wasn't wanted, or didn't want to play anymore, he'd just "retire", sit around for a few weeks or months and then magically return to the team for a lower salary.
Remember Junior Seau, said "I don't want to/can't play anymore" and left, only to sign with the Pats a short time later, at a low salary, rather than the Pats having to suck up his Chargers salary/give up draft picks to get him. Just another way for the Patriots to cheat, or at least bend the rules to suit them.
I'm no salary cap expert, maybe somebody here can figure it out, not saying they couldn't re-sign Dez or Tony, but it seems way too easy...