It's not a player's fault that he gets drafted high or that much is expected of him. Teams draft players because of what they have done and, more important, what they might be able to do.
I have frequently written that it is a mistake to think a player has arrived after one good month just as it is a mistake to think they are doomed for failure because they had a bad month, season, or even two seasons. However, it is fair to evaluate second-year players to determine just where they stand in the league.
There is not a defining connection between players younger than 22 who start out poorly -- some end up figuring it out, some don't. As discussed frequently, much of that success or failure results in large part to where the player is playing, who he is playing for, etc.
For these five men, though, there has been ample opportunity for them to consistently impress. But this season they have all taken a step backward or sideways. Here are the most disappointing players of this class: