Professional Sports

In the world of Professional sports trades are a part of the game. You know going in that at somepoint you maybe traded to another team. It must be hard to be teammates with a group of people and then in an instant have to severe that companionship and build a new relationship with new teammates.
I know i would miss my teammate if i was traded for someone else.
It is however a part of the deal you sign when you first become part of a team.
Not always fair though i would say.