I don't know where this false idea that Sullinger is bad at defense started but lets end this myth. Sully's always been an excellent defender. He already knows the rotations better than Green, Lee and Collins. He challenges every perimeter shot and does fantastic pushing bigs off the paint. As Doc stated his only weakness is not knowing personnel, but the vets and tape will take care of that. Sullinger is not athletic, but smart, strong, long and moves very well due to effort and footwork.