In the NBA, as with most other sports, you see players get churned around and around until there's nothing left in their legs, at which point they become coaches if they are deemed smart enough.
However, as with many things in sports, bringing back an old veteran or hiring a retired player as a coach can be a crapshoot.
Often it's a practice in the NBA for a team to bring back a veteran player who had his best days in their city in order to give him one last contract and one last whirl in the city that made them famous. It's a scenario that many have brought up as a possibility with LeBron James and the Cleveland Cavaliers—whether it is realistic or not is beside the point.
Occasionally, a player who has bounced around the league for a bit will have a reunion with his old team and it will be a nice thing to experience. However, there are countless examples of players coming back to their old teams and a disastrous season coming instead.
Which of these reunions were the most depressing to see and the hardest to watch? Why, that's what you've got me here for, guys: to tell you the worst scenarios in this case.