The 75 greatest players in NBA history, ranked by Player Efficiency Rating (PER)

12.    Charles Barkley-24.63

Hall of Famer Charles Barkley is one of the few players on this list who can say that they are more popular now than they were during their playing career. Before he became an analyst, Barkley was known as the "Round Mound of Rebound," and while only 6'6, he dominated the glass as well as opposing players that were several inches taller than him.

Barkley was a consistent and strong offensive threat, averaging at least 20 points and 10 rebounds per game for 11 straight seasons. He was also an effective playmaker. He could grab a rebound, bring the ball up the floor and find teammates open shots. Being above average in points, rebounds, and assists allowed him to stuff the stat sheet and earn a 24.6 PER over his career.

That puts him 12th in all-time PER, which, like most players on this list, may be too high for him. Barkley is generally considered to be a top 30 player in NBA history, but few probably have actually had him in their top 15.