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Parker gets them, and he's kind enough to let the opposition get them too.
That's a problem.
Another one of Bleacher Report's draft sages, Daniel O'Brien, discussed some of Parker's biggest flaws:
Parker's defense has intermittently come under scrutiny this year, as he hasn't excelled on that end compared to Marcus Smart, Andrew Wiggins or Aaron Gordon.
He frequently got beat by quicker slashers and gave up a few critical layups. On the interior, he was often out of position and caught in no-man's land. That's a bad place to be, especially on pick-and-rolls and weak-side rotations.
Foul trouble was among his Achilles' heels as well, no doubt thanks to his poor rotations and inferior positioning. His defensive rating was stellar (99.3), and better than Wiggins' (102.8), but Duke was forced to cover up his transgressions on that side of the ball. Most of the numerical success he had was the product of Mike Krzyzewski's sporadic adjustments.
A lasting image of Parker's defensive inadequacy was left against Mercer, who upset Duke in the first round of the NCAA tournament.
Coach K was repeatedly forced to sub Parker out for defensive purposes. That says something. The best players are supposed to be on the floor with the game, with the season, in jeopardy.
While Parker is only 19 and is capable of improving, the Cavs aren't defensive juggernauts. They ranked 17th in defensive efficiency last season, a finish they won't improve on if Parker enters the starting lineup.
Blatt also isn't known as a defensive-minded coach. If he doesn't hire a battle-tested defensive specialist, Parker may never fully understand how to consistently play on that side of the floor, rendering the Carmelo Anthony comparisons invalid—in that his defense could be even worse.