Interesting stat on 82games.com:
When you take add the +/- minus ratio of when the player is on the court and minus +/- ratio of when the player is off the court
to get an idea of how much a player adds to his team and how much they miss them when he's off the court:
Kyle Korver is leading the list!! at 31.0 a game.
Before you completely bash this stat which seems an interesting to me the rest of top ten include a lot of the usual suspects: Kirilenko, Bryant, Lebron, Duncan, Dirk
Roland Rating