I really don't think there is much of a chance Posey gets bought out. He has two years left on his contract, he can help Indy, and if they buy him out, they may actually end up paying him more money than if he just let him play out his contract.
That is because they would likely have to pay a large portion of next years contract in addition to all of this years to buy him out. If there is a lockout next year, he wouldn't see any of next years salary, however, if he is bought out, I believe he would get the balance of the buyout, whether there is a lockout or not.