The Boston Celtics know that they are going to need to establish legitimate paint protection if they are ever going to be a formidable defensive team. The team has what they need in the back court with Avery Bradley, Marcus Smart and potentially Terry Rozier but they have absolutely no support from the interior.
Tyler Zeller has given the Celtics very little hope that he can become that force in the paint and Kelly Olynyk is even further behind him. The team made two additions in Amir Johnson and David Lee but neither of them are known for their defensive impact.