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

18.    Karl-Anthony Towns-23.96

Seeing Minnesota Timberwolves star Karl-Anthony Towns on this list is a bit surprising, since he still seems to be relatively early in his career. However, he is actually in his ninth season and on pace to play his 600th game, more than enough of a sample size for him to appear on this all-time list.

Towns has proclaimed himself as the best shooting big man of all time, and while that has understandably caused many a rolled eye, he actually may have a case. Towns has averaged at least 20 points per game over eight of his first nine seasons and has an astoundingly high 62.4 true shooting percentage.

That is far higher than the likes of Dirk Nowitzki and Chris Bosh—higher than virtually any player on this list, in fact. His career shooting splits of 52.4% from the field, 39.8 from three, and 83.9% from the line are all outstanding, which ensures that he'd rank highly in PER since efficiency is literally in the name.

It goes without saying that Towns won't remain at 18 in career PER forever and is bound to regress but that could be several years away, seeing as he is only 28. Adding a few more strong seasons should help him offset any bad ones that are sure to come so he should still rank high in terms of PER.