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

38.    Russell Westbrook-22.05

Former league MVP and triple-double threat Russell Westbrook, unsurprisingly, ranks in the top-40 in all-time PER and has a chance to move up this year. Westbrook is in his 16th NBA season but is still putting up strong numbers, averaging 11.2 points, 5.2 rebounds, and 4.5 assists in just 22.9 minutes per game. 

Across the board production has been key to success in PER, even though he hasn't always been the most efficient player. While he got to the rim at will during his prime and practically lived at the free throw line, he often took plenty of ill-advised mid-range jumpers and 3-pointers.

Be that as it may, on a per-minute basis, Westbrook is one of the most productive players that we have seen in the NBA. Actually, he is set to become the first player in league history to record 200 triple doubles, leaving the previous all-time leader in triple doubles, Oscar Robertson, in his dust. Excelling in points, rebounds, and assists certainly helps his ranking and is the main reason he is one of the few point guards on a big man-dominated list.