Every sport has its share of knuckleheads, but that's especially true for the NBA.
It gets very frustrating at times to watch a player with so much talent underachieve on and off the court.
The NBA is filled with this type of player.
To define knucklehead, in this case, I'm talking about players who have the ability to make the game look easy. But, in addition, they're a head case, immature or have a lazy demeanor that affects their play from time to time.
These guys have the talent to play the game at its highest level but do things that belittle their talents like like being a ball hog, statistically underachieving, and sometimes, don't give their maximum effort.
Yeah, every NBA team likely has a player who fits into that category.
Yet, I have faith that the guys on this list will find a way to put it together in 2013 and change their knucklehead behavior.