This article on NBA.com describes how the Warriors were able to greatly improve their defense this year. Cited as the primary basis for this increase is a change in how big men defend the pick and roll, having them sag into the paint rather than show hard. This is the same change that Stotts has implemented for the coming season. Might this be the cause for the massive production that we've seen from the Blazers on the boards so far in the preseason? If it keeps up, the Blazers could find themselves significantly improved on defense this season.