NHL players and the management groups that employ them are as human as anybody else, thus they cannot always foresee a poor transaction. Those parties are especially difficult to blame when the player in question constitutes a high-quality commodity and all is good with his current state of affairs.
Nonetheless, once it is in effect, a bad move is just that and everyone would just as soon repeal it.
Management makes trades and pens contracts while players choose to accept a trade, change uniforms via free agency or keep things status quo. Sometimes, the new acquisition fails to mesh correctly with his new team or, whether he stays with one organization or goes elsewhere, a player's talent suddenly erodes.
Here are 10 Hockey Hall of Fame-caliber players―whether they are already inducted or should be in the not-too-distant future―who had at least one particularly vinegary period in an otherwise delectable career.