Trades in sports are always a risky proposition. You never know what you're going to get or what you are giving up. You can do all the research, crunch all the numbers, ask all the experts and still walk away looking like a fool, just as easily as you can walk away looking like a genius.
What follows are 15 examples of NHL trades where one side looked like a group of dunces, while the other walked away looking like the smartest guys in hockey. I know that hindsight is 20/20, but really, some of these trades seemed to lack foresight or, really, any sight at all.