I exclude centers who are in their rookie contracts ( like Al Horford ) .
Who are in centers ' third or fourth NBA contracts ( like Shaquille O'Neal ) to focus on players who are on a similar pay scale .
I exclude centers who are in their rookie contracts ( like Al Horford ) or who are in their third or fourth NBA contracts ( like Shaquille O'Neal ) to focus on players who are on a similar pay scale .