BETTER PER WITHOUT NBA ALL-STAR GAME
This list includes the Top 45 players with the highest PER (*) in their careers who did not
play in any NBA All-Star Game. Only players with at least 5.000 minutes
in the NBA.
Most of them (27) are still active. The are a few on the verge of becoming NBA All-Star players (DeMarcus Cousins, Serge Ibaka and Kawhi Leonard for example). It's usual to find young players on this list (Kemba Walker, Derrick Favors, Nikola Vucevic) who in the mid-term could become in All-Star players too. If these young players don't keep their performance level, they will simply leave the list.
Stats updated until 2013-2014 regular season.
(*) The Player
Efficiency Rating (PER) is a per-minute rating developed by John
Hollinger. In John's words, "The PER sums up all a player's positive
accomplishments, subtracts the negative accomplishments, and returns a
per-minute rating of a player's performance."
If you want to know more about PER and other advanced stats, check basketball-reference site.