The NBA releases the weights, heights and other measures they take at this pre-draft combine in Chicago. One of the more interesting categories is always body fat, since it's a gauge of how well these guys have stayed in shape.

Here's a surprise: Duke's Kyrie Irving and Arizona's Derrick Williams -- the frontrunners to be the first two selections June 23 -- were among just seven draft prospects with body fat at or above 10 percent.

Irving was at 10.2 percent and Williams at 10.8. Duke's Kyle Singler was also up there, at 10 percent.

NBA scouts and coaches generally say players should never top 8 percent body fat, at least in-season.