Perk is known as one of the better defenders at his position in the league. He has the strength to hold his own against guys like Shaq, Dwight Howard and Bynum. You can't teach size...Also his offense is coming around and his help defense is solid. He can run the floor, albeit a bit awkwardly, and he's still really young. He's a few years out from peaking and he will only get better. He played great while KG was out, and that was teamed with Rasheed who never goes below the foul line on offense. Perk is one of the cornerstones, IMO.