@jrichardgoodman
In mid-60s seasons, Wilt played 70% of his games vs Reed, Bellamy, Thurmond, Beaty,Embry,Bill Russell. When Mutombo, Mourning,DRob, Hakeem , Shaq & Ewing ruled, the Assn had expanded to the point that the tier one centers played approx 20% of their games vs each other.