Kentucky's Julius Randle is seen as one of the top prospects in the loaded 2014 draft, but one key measurable throws a lot of doubt on whether his game will translate from college to the pros.

Kentucky's Julius Randle looks the part of a big-time prospect. At 6'9 and 250 pounds, he's a 19-year-old with the body of a grown man. His combination of size and athleticism makes him nearly indefensible at the college level. Kentucky has been up-and-down in non-conference play, but Randle has lived up to the hype. He is a double-double machine averaging 18 points and 11 rebounds on 57 percent shooting.

But when you project his game to the NBA, there is one glaring flaw that would make me nervous if I used a top-five pick on him.

Randle is built like a Tyrannosaurus Rex: all torso and no arms.
Randle is built like a Tyrannosaurus Rex: all torso and no arms. He has a 6'11 wingspan, per Draft Express, which is enormous in most contexts, but not the super-sized world of the NBA paint. When matched up against the best power forwards in the world, he's going to have a significant length disadvantage, a problem that could impact his game on both sides of the ball.

In almost any basketball context, having longer arms than your opponent is helpful. The guy with the longer arms can shoot over the top of of his defender. On defense, he can play a step farther back and still contest the other guy's shot. He has an easier time reaching for rebounds and getting hands in passing lanes. The closer you get to the basket, where there is less room to maneuver, the more important this becomes.