Buyer's remorse is defined as "the sense of regret after having made a purchase, frequently associated with an expensive item."
In the sports world, this equates to player contracts and trades that end up bad for the teams. And in the NFL over the past couple years, the kings of buyer's remorse are the Eagles.
There's nothing worse for general managers and contract negotiators than to have a deal turn sour. Of course, some contracts and trades inevitably do not work out due to injuries, poor performance or bad fits. They’re calculated risks, costs of doing business.