Duncan is not even the best player on his team. I'm not talking about all time--obviously he beats everyone there. The Spurs are Parkers team. They are nothing without him. He holds the ball 70% of the time. Parker running through a screen an roll every play and setting up teammates is more important than Duncan's post presence. WHen Parker does that he's tiring out the entire OKC defense on rotations.
OKC would love it if you just gave it to DUncan in the post every play.