It also tends to overrate power forwards. (Like I don't think Amare is one of the 26 best players in the history of the game) And also volume shooters; I rerad a study that basically any shot you take as long as you make over 33% or some ridiculously low threshold helps your PER. And you are also including some active players; I don't think you can compare a career rate stat for a guy who is retired to one for players who are still playing. Paul, Wade, Durant; don't really think you can count those guys. And Dr. J is only ahead of Bird if you include the ABA years; in pure NBA PER Bird moves ahead of him.
PER is also just one number. It's nowhere close to a perfect stat. If you think a 6-8 210 pound center who played 60 years ago and shot 44% from the field and only played 516 games in his career is better than Larry Bird (I don't think you do, just saying) then I'm going to have to go ahead and disagree. Bob Petit was legimately a great player, but he was also 6-9 205 and a bruiser type and played a game that didn't feature a ton of black players. I can't really put him ahead of Bird.
Also, I'm not 100% sure how they come up with PER for pre 70's players; they didn't even track turnovers or blocks or steals back then. You have any idea?
I think Bird, Magic, Kareem, and Russell are all in the top 6 or 7 players of all time, and none of them rank in the top 10 of PER. I think David Robinson was great, but I don't think he is one of the five best players of all time. So I'm not going to rely on it for too much.
Actually, taking it a step further, I don't know how many of the all time top 10 in PER I would have in my top ten of all time. Jordan, Lebron, Wilt, maybe Duncan. And that's probably it.
Edit: Went on the website, this is how they handle PER from pre 70's
The calcuation of uPER obviously depends on these statistics, so here are my solutions for years when the data are missing:
- Zero out three-point field goals, turnovers, blocked shots, and steals.
- Set the league value of possession (VOP) equal to 1.
- Set the defensive rebound percentage (DRB%) equal to 0.7.
- Set player offensive rebounds (ORB) equal to 0.3 * TRB.